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The Last Leonardo: The Making of a Masterpiece
Ben Lewis

500 years after the death of Leonardo Da Vinci, Ben Lewis considers the unrivalled legacy of his art through an original biography of the вЂ?Salvator MundiвЂ™ (Saviour of the World) вЂ“ the lost Da Vinci painting.In 2017, Leonardo Da VinciвЂ™s small oil painting, the Salvator Mundi entered global popular consciousness with its record-breaking $450m sale in 2017. The Salvator is, in the words of its discoverer, вЂ?the rarest thing on the planet by the greatest human being who ever lived.вЂ™ Only re-attributed to Leonardo in 2011, as the last one that will be discovered and sold, it is widely said to be вЂ?the Last LeonardoвЂ™.In this stunning mix of biography, art history, history and thriller that goes deep into the story of this astonishing picture, not to mention the shady dealings of the contemporary art world, Ben Lewis writes a truly original and gripping narrative history.This book forensically retraces the history of the Salvator Mundi, uncovering a very different narrative from the carefully edited, sanitised and sometimes spurious one presented by the dealers and connoisseurs, who marketed and sold it. The real painting is a prism through which we can understand the highs and lows of the art world, experiencing the passions that drove men and women to own this work, as well as the philistinism that led them to almost destroy and lose it; through which we can track the vicissitudes of the highly secretive and unregulated art market, across five centuries and the intrinsic link between art and the social and political system it inhabits. This story is an opportunity to tell a twisting tale of geniuses and gangsters, double-crossing, disappearances and sometimes dubious attributions, where weвЂ™re never quite certain what to believe.The Last Leonardo is an adventure story about art historians and a work of art. It is a book about a search for lost treasure, for something with a totemic power, that existed, until recently, only in myth and legend.

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Copyright (#u1f11650b-63b2-56b9-859b-8cdd9c9d5d55)

William Collins

An imprint of HarperCollinsPublishers

1 London Bridge Street

London SE1 9GF

www.WilliamCollinsBooks.com (http://www.williamcollinsbooks.com)

This eBook first published in Great Britain by William Collins in 2019

Copyright В© BLTV Ltd, 2019

Cover image: Photo by Fine Art Images/Heritage Images/Getty Images

The author asserts the moral right to be identified as the author of this work

A catalogue record for this book is available from the British Library

All rights reserved under International and Pan-American Copyright Conventions. By payment of the required fees, you have been granted the non-exclusive, non-transferable right to access and read the text of this e-book on screen. No part of this text may be reproduced, transmitted, down-loaded, decompiled, reverse engineered, or stored in or introduced into any information storage and retrieval system, in any form or by any means, whether electronic or mechanical, now known or hereinafter invented, without the express written permission of HarperCollins.

Source ISBN: 9780008313418

Ebook Edition В© April 2019 ISBN: 9780008313432

Version: 2019-04-15

Dedication (#u1f11650b-63b2-56b9-859b-8cdd9c9d5d55)

Contents

1В Cover (#u944df40e-3631-55b5-a41c-43bf3b071632)

2В Title Page

3В Copyright

4В Dedication

5В Contents (#u1f11650b-63b2-56b9-859b-8cdd9c9d5d55)

6В Epigraphs

7В Prologue: The Legend of Leonardo

8В PART I

9В 1 Flight to London

10В 2 The Walnut Knot

11В 3 Buried Treasure

12В 4 Paper, Chalk, Lapis

13В 5 Zing!

14В 6 The Blue Clue

15В 7 Vinci, Vincia, Vinsett

16В PART II

17В 8 The KingвЂ™s Painting

18В 9 Little Leonardos

19В 10 The Salvator Switch

20В 11 The Resurrection

21В 12 Lost in a Crowd

22В 13 The High Council

23В 14 Entertainer and Engineer

24В 15 The Greatest Show on Earth

25В 16 Look, Cook Forsook

26В PART III

27В 17 Offshore Icon

28В 18 LDV RIP

29В 19 Nineteen Minutes

30В 20 There is a House in New Orleans

31В 21 Mirage in the Desert

32В 22 Fragile State

33В Afterword

34В Picture Section

35В Acknowledgements

36В Notes

37В Bibliography

38В Index

39В About the Author

40В About the Publisher

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Epigraphs (#u1f11650b-63b2-56b9-859b-8cdd9c9d5d55)

Having wandered some distance among gloomy rocks, I came to the entrance of a great cavern, the likes of which I had never seen. I stood for some time in front of it in astonishment. I bent over, resting my left hand on my knee, while shading my eyes with my right. I squinted, shifting first one way and then the other, to see whether I could ascertain anything inside, but this was hindered by the deep darkness within. After having remained there some time, two contrary emotions arose in me: fear and desire вЂ“ fear of the threatening dark cavern, desire to see whether there were any marvellous thing within it.

LEONARDO DA VINCI

The politics of Leonardo scholarship are like any other politics except that so far no blood is shed.

SIR KENNETH CLARK

Signs form a language, but not the one you think you know.

ITALO CALVINO

It ainвЂ™t where ya from, itвЂ™s where ya at

ERIC B. & RAKIM

PROLOGUE

The Legend of Leonardo (#u1f11650b-63b2-56b9-859b-8cdd9c9d5d55)

Centuries ago, in an age when the world was still ruled by monarchs and dukes and countesses dressed in velvet and golden brocade, there lived a man of illegitimate birth, as warm-hearted in his disposition as he was boundless in his curiosity, fierce in his intellect and skilful with his hands. This man was engineer, architect, designer, scientist and painter вЂ“ the greatest painter, say many, who had ever lived. A genius, say others, who had brought the modern world into being. His pictures were both real and ideal, more beautiful than anything ever seen before. He studied the natural world in its tiniest details, from the leaves on trees to the paws of bears, and in its hidden rules, such as the proportions of the human face and body. He looked far and peered close, sketching the pale horizons of mountains and peeling back menвЂ™s skin so he could see the muscles and arteries that lay beneath.

But this artist was also an enigma. When he died, he left riddles and tricks for those who wished to cherish his memory and preserve his legacy. Sometimes his masterpieces were painted with colours that faded or crumbled even before he had finished the work; others were sealed with varnishes that made them darker and darker with the passing of decades. Like many great men, he seemingly cared little for the gift God had given him, painting little and slowly, and instead burying himself in the notebooks that he filled with scribbles of magnificent ideas, which he had neither the patience nor the technology to build. He made fewer paintings than any other great artist in history, and even fewer have survived: at most only nineteen.

In the centuries that followed his death, people yearned to possess more of his work than they had; there were never enough pictures by this artist to satisfy the worldвЂ™s craving for his images. Myths and theories proliferated about the pictures that had been lost, hidden or painted over. In the institutes of learning devoted to the arts, there was no higher calling than the study of this artistвЂ™s work; and among those scholars who studied his art, there was no greater glory than discovering a lost or forgotten painting, drawing or sculpture by his hand.

The stakes were high вЂ“ and, if you fell on them, sharp. The artist never signed or dated his work. He had many pupils, whom he taught to paint as skilfully as himself, in exact imitation of his style, and they produced hundreds of copies of his works. Occasionally, a contemporary recorded, he would add the final touches himself вЂ“ a fact which further confused posterity. Knowing the risks, the wisest scholars sought to resist the temptation to identify a lost painting, preferring to explore an overlooked fragment or a half-finished sentence in the artistвЂ™s notebooks. But, eventually, many succumbed to the allure of buried treasure. The corridors of art history libraries were full of the wailing ghosts of professors whose lifeвЂ™s work had been destroyed by the chimera of a вЂ?newвЂ™ Leonardo they believed they had found; the headlines, news reports and celebrations that greeted their discovery were replaced within years, if not months, by academic derision for what was now revealed to be a forgery or copy, betrayed by paint that had been applied too loosely, or colours pronounced too dominant, or in which there was a trim in the costume that belonged to an incongruous era.

This artist, Leonardo da Vinci, was just like the sun. He was the brightest planet in the art history cosmos. Scholars who flew too close to him found their books suddenly aflame and themselves engulfed in the fire of ambition. Yet still their attempts continued вЂ¦

PART I (#u1f11650b-63b2-56b9-859b-8cdd9c9d5d55)

CHAPTER 1

Flight to London (#u1f11650b-63b2-56b9-859b-8cdd9c9d5d55)

Robert Simon had plenty of legroom on his flight to London in May 2008. He was flying first class, an unusual luxury for this comfortably successful but unostentatious Old Masters dealer, president of the invitation-only American Private Art Dealers Association. During moments of transatlantic turbulence he cast a glance down the aisle at one of the first class cabinвЂ™s cupboards, where he had been given permission to stow a slim but oversized case.

It contained a Renaissance painting, 66cm high and 45cm across, of a вЂ?half-figureвЂ™, to use the old-fashioned art historical term, of Christ. The portrait composition showed the face, chest and arms, with one hand raised in blessing and the other holding a transparent orb. One reason Simon was worried about the painting was because he had not been able to afford the insurance premium he had been quoted for it. He had bought it three years earlier for around $10,000 вЂ“ or so he had told the media вЂ“ but it was now thought to be worth between one and two hundred million dollars.

Far from being the life of luxury many people imagine, dealing in art can be a precarious existence even at the highest levels, because selling expensive paintings is, well, very expensive. Top-end galleries have vertiginous overheads. Walls have to be repainted for each show, catalogues printed, wealthy collectors wined and dined. Simon had spent tens of thousands of dollars restoring the boxed painting, and had not yet seen a penny return.

Solidly built, medium height, Jewish, fifty-something, soft-spoken, polite, Robert Simon is the kind of person who believes that modesty and understatement are rewarded by the higher forces which direct our lives. He projects a modest, pleasant, but slightly brittle calm. вЂ?Loose lips sink ships,вЂ™ he likes to say, repurposing a slogan emblazoned on American propaganda posters in the Second World War to the business of art.

Simon leant backwards in his seat. He was overcome by that mood men fall into when they know the die has been cast, the pieces arranged on the board, and there is nothing more they can do except perform a sequence of now predetermined actions. There could be no more organising, influencing, persuading. It was all done, to the best of his abilities. The confinement of the long pod of the aircraft cabin and the sensation of forward motion provided by the thrust of four jet engines combined into a physical metaphor for this moment in his life.

Alongside the submarine, the parachute and the machine gun, the aeroplane was the most famous invention anticipated by the artist who had consumed SimonвЂ™s life for the previous five years. Leonardo da Vinci was not the first human who had designed flying machines, and it is likely he never built one himself, but he had studied the subject for longer, written more, and drawn designs of greater sophistication than anyone before him. His ideas for human flight were based on years of watching and analysing the airborne movements of birds, bats and flying insects, and recording his observations in notes and drawings. As Simon felt air currents lifting up the plane, he recalled how Leonardo was the first to recognise that the movement of air was as important to a birdвЂ™s flight as the movement of its wings.

On 15 April 1505 Leonardo completed a draft treatise On the Flight of Birds, also known as the Turin Codex. It was only about forty pages long, filled with unusually neat lines of text, written in black ink in his trademark mirrored handwriting, right to left, interspersed with geometric diagrams, and the margins sometimes decorated with tiny, beautiful sketches of birds in flight. LeonardoвЂ™s early ornithopters, or вЂ?birdcraftвЂ™, had wings shaped like a batвЂ™s, because, as he wrote, a batвЂ™s wing has вЂ?a permeable membraneвЂ™ and could be more lightly constructed than вЂ?the wings of feathered birdsвЂ™, which had to be вЂ?more powerful in bone and tendonвЂ™. Leonardo positioned his pilot horizontally in a frame underneath the two wings, where he was to use his arms and legs to push a system of rods and levers to make them flap. Historians say Leonardo soon came to realise that the human body was too heavy, and its muscles too weak, to provide enough power for flight, so his later designs had fixed wings and were more like gliders. He imagined launching one, appropriately, from a mountain вЂ?named after a great birdвЂ™, referring to Monte Ceceri, or вЂ?Mount SwanвЂ™, in Tuscany. Relishing the avian metaphors, Leonardo wrote that his вЂ?great bird will take its first flight on the back of the great swan, filling the universe with amazement, filling all writings with its renown and bringing glory to the nest in which it was bornвЂ™. Nothing he designed ever flew. The contraptions were almost daft, but there was prophetic genius in his perception of the natural phenomena and laws of nature which gave rise to his machines.

Robert Simon knew that, whatever the outcome of this trip вЂ“ and that really could be everything or nothing вЂ“ it marked the pinnacle of his career to date in the art world. If everything went well, he would probably earn a place in the art history books. If not, he would remain respected but unexceptional. This flight also represented the apogee of something more personal. In common with most art dealers, there was a motivation behind his career which had nothing to do with money or success, and which had shaped his life for somewhat longer: an unconditional, unrelenting love for art; not modern and contemporary art with its splodges, squiggles and splats, but the great art of the past, especially the Renaissance, in which the eternal stories of the Bible and of Ancient Greece and Rome were brought to life by the melodramatic gestures of bearded men and golden-haired women, amidst thick gleaming crumples of silk and satin cloth, set against a classical backdrop of esplanades and porticos, temples and fortresses.

When he was fifteen, Simon went on a school trip to Italy. He remembers the winding roads of the hills around Florence, the low sun flashing through the cypress trees as the bus drove towards the town of Vinci, the birthplace of Leonardo da Vinci, from Vinci. (By coincidence, my parents would take me on a similar trip in my own teenage years.) вЂ?Leonardo has been my deity for most of my life вЂ“ and I am not alone,вЂ™ Simon told me. вЂ?HeвЂ™s my idea of the greatest person that civilisation has produced.вЂ™ Over the decades Simon had seen every major Leonardo exhibition that had been staged, and every Leonardo painting, and вЂ?as many drawings as I couldвЂ™. His professional life, which now revolved around Leonardo, had taken him once before into the artistвЂ™s sphere, in 1993, when he was asked to examine the Leicester Codex, one of LeonardoвЂ™s revered manuscripts, for its owners. It is now owned by Bill Gates, but then belonged to the oil magnate Armand HammerвЂ™s foundation.

SimonвЂ™s family were well-to-do but had not been deeply involved in art. His father was a salesman of eyeglasses. Simon was sent to an exclusive, academically orientated high school, Horace Mann School, in the New York suburb of Riverdale. Afterwards he specialised in medieval and Renaissance studies, and then art history, at Columbia University. He wrote his PhD on a newly discovered painting by the sixteenth-century Italian Mannerist painter Agnolo Bronzino, held in a private collection. A portrait of the Florentine Medici ruler Cosimo I in gleaming armour, it was known from the many copies, around twenty-five of them, which hung in museums and homes, or sat in storerooms around the world. Art historians had long considered that the original work was the one in the Uffizi, FlorenceвЂ™s famous museum. However, in a story with uncanny parallels to that of the painting that he was now taking to London, the young Simon had argued that he had identified an earlier original of this painting, the owners of which wished to remain anonymous. He published an article about it in the esteemed journal of connoisseurship and painting, the Burlington Magazine.1 (#litres_trial_promo) The painting now hangs in an Australian museum, as a Bronzino, although some experts still believe it was painted by the artistвЂ™s assistants.

Simon climbed the ladder of the art business slowly. He was a research fellow at the Metropolitan Museum in New York. He taught briefly. He tried, but never succeeded, to enter the academic side of the art world. вЂ?The basic truth is I could not find an academic position in a place I liked,вЂ™ he says.

He contributed reviews and articles to the Burlington Magazine, wrote catalogue essays about Italian Renaissance artists for SothebyвЂ™s and minor museum exhibitions from Kansas to Milan. In the 1990s he also wrote catalogues for selling exhibitions at New YorkвЂ™s Berry-Hill Galleries, which collapsed under multiple lawsuits in the mid-2000s.

Simon found employment as an appraiser, one of the more discreet jobs in the Old Masters art market. The appraiser is invited by a collector to assess the quality and value of a work of art, usually with an eye to a sale or purchase, also for divorce settlements and for gifting or loaning to museums, for which there are lucrative tax breaks which American collectors wisely take advantage of. Just as often, the appraiser answers a call from a family that has inherited artworks. вЂ?Often one is called in to value the estate of someone who has recently passed away, so itвЂ™s not exactly a pleasant situation. Maybe two months after a personвЂ™s died, youвЂ™re in an apartment and the place has not been touched and there are paintings still on the wall, often things that have been there for years and havenвЂ™t been cleaned. YouвЂ™re looking at these paintings in poor light and poor conditions, and thereвЂ™s a certain treasure-hunting feel to it, but itвЂ™s also compromised by the situation.вЂ™ Years of experience had taught Simon to peer through the gloom of dark rooms, and the dirt of unrestored and unloved paintings, to perceive a glimmer of quality and art history.

Appraising is a job that embodies one of the great conundrums of the art world вЂ“ the source of much suspicion and conspiracy theory вЂ“ which is the interwovenness of scholarship and the market. As Simon says of his work as an appraiser, вЂ?ItвЂ™s usually about the financial component, but often enough one has to do a fair amount of research to figure out what it is exactly that one is dealing with before one gets to the value stage.вЂ™ The appraiser needs to be as familiar with the development of an artistвЂ™s style as he or she is with archives of auctions and inventories, through which a paintingвЂ™s history may be traced. And the appraiser needs to understand the parabolas of the rise or fall of an artistвЂ™s prices, as collated in subscription-only databases. This work, and indeed every kind of dealing in Old Masters, requires a capacious visual and factual memory. You need to be able to recall thousands of works of art, often in their smallest details.

Robert Simon began working as a dealer in 1986, and set up his own gallery in the house he bought in Tuxedo Park, New York state, in the early 1990s. He specialised in European Renaissance and Baroque art, and also took an interest in colonial Latin American art. He followed up his discovery of the Bronzino portrait with a handful of other Renaissance finds: a Parmigianino here, a Pinturicchio there. Over the years he has sold a handful of paintings and sculptures to American museums in Los Angeles, Washington, Detroit, Yale and so on. Curators appeared to respond favourably to his low-key, insistently academic manner. But whatever his past successes, he is the first to admit that he had never sold a work of art as exceptional, or as expensive, as the one he had walked on board this aircraft with, carrying it in a custom-made aluminium and leather case supported by a long strap over his shoulder.

Inside the elegant case was a painting depicting Salvator Mundi, Christ as Saviour of the World, which Simon now believed to be by Leonardo da Vinci. He had only heard informally who would be looking at his picture in London. A few months earlier in New York he had shown it to the director of BritainвЂ™s National Gallery, Nicholas Penny. Penny was impressed, thought it could be a Leonardo, and had sent one of his curators, Luke Syson, across the Atlantic to examine it. Syson had begun work on an ambitious Leonardo exhibition that would open several years later, and he saw potential in the painting too. SimonвЂ™s trip to London was Penny and SysonвЂ™s idea. It would be highly irregular, if not unprecedented, to include a recently discovered but unconfirmed work by such a famous artist, and one which was also currently on the market, in an exhibition at a museum of the international standing of LondonвЂ™s National Gallery. Syson and Penny decided to discreetly convene a panel of the greatest Leonardo scholars in the world to judge the painting behind closed doors, before taking a decision on whether to include it in their exhibition.

Simon knew the odds would be stacked against him and his painting. There was a small army of Leonardists, as they were known, traversing the world, each with a long-lost and newly discovered Leonardo under their arm, trying to build an array of opinions favourable to their cause from museums and universities. Different art historians were allied to different paintings, and, such is the nature of academia today, all were competing with each other. There was the so-called Isleworth Mona Lisa, originally from a collection in a British country house but now owned by a consortium of investors who had set up a front organisation called the Mona Lisa Foundation. Western museums never showed it, but the Isleworth Mona Lisa had been exhibited in a luxury shopping centre in Shanghai. There was a Leonardo self-portrait, known as the Lucan Panel, discovered in southern Italy by an art historian who was also a member of a society linked to the Order of the Knights Templar, founded in the twelfth century, to which, legend has it, Leonardo himself had once belonged. That painting had been on show at a Czech castle, but was turned down by the University of Malta. The Victoria and Albert Museum in London had the Virgin with the Laughing Child, a small terracotta which it had long attributed to the Renaissance artist Rossellino, but which this or that art historian periodically tried to reclassify as LeonardoвЂ™s only known surviving sculpture. There was even another Salvator Mundi supposedly by Leonardo, known as the Ganay, named after its last known owner, the French resistance hero Jean Louis, Marquis de Ganay. The last time a paintingвЂ™s reattribution to Leonardo had been widely accepted was ninety-nine years ago: the Benois Madonna, which today hangs in St PetersburgвЂ™s Hermitage Museum.

When Old Master dealers are not selling established masterpieces on behalf of an important client вЂ“ the easy side of the business вЂ“ they spend their time finding lost, overlooked or simply underrated works of art, dusting them off, identifying their author and then attempting to sell them as something bigger and better than what they had originally bought them as. The game is to exercise вЂ?connoisseurshipвЂ™, using the eye, as it is known, to spot undervalued works. вЂ?I liken this ability to recognise an artist from what he paints to knowing your best friendвЂ™s voice when he calls on the phone,вЂ™ Simon told me. вЂ?He doesnвЂ™t need to be identified, you just know, from a combination of the intonation of the voice, the timbre of it, the pattern of speech, the language that he or she might use. There are these elements that when put together amount to fairly distinctive patterns that you, as someone who knows this person, would recognise. ThatвЂ™s really the essence of connoisseurship. There are many in the art community and the art historical community who dismiss it as some sort of voodoo process, but itвЂ™s both very rational and at the same time is based on a subjective understanding of things certain people have a knack for, or have studied вЂ¦вЂ™ It is not easy to find the right words to define this elusive process. No wonder Simon was nervous.

ItвЂ™s worth mentioning that the painting inside his case was a connoisseurвЂ™s worst nightmare. It had once been as damaged as any Renaissance painting could be. It had a great slash down the middle; the paint had been scraped away to the wood on parts of the most important part of any portrait, the face; it had broken into five pieces and was held together by a ramshackle combination of wooden batons on the back, known as a вЂ?cradleвЂ™. There was no contemporary documentation: not a contract, not an eyewitness account from the time, not a note in a margin about this painting, not one scintilla of evidence that dated from the lifetime of the artist, aside from the odd drawing of an arm or a torso, which bore only a partial resemblance to the finished picture. The painting had vanished from sight for a total of 184 of its estimated five hundred years of existence вЂ“ 137 years between 1763 and 1900, and another forty-seven years between 1958 and 2005. When the great British art historian Ellis Waterhouse saw it at an auction in London in 1958, he scribbled one word in his catalogue: вЂ?wreckвЂ™.

Robert Simon was on a high-risk mission. He hadnвЂ™t even been able to afford the insurance premium for the full worth of his hand luggage. The auction house SothebyвЂ™s had helped him in the end by kindly writing a low valuation of the painting at only $50 million. His piece was fragile. He wasnвЂ™t sure it would survive the plane trip, let alone make it onto the walls of a world-class museum or into the saleroom of a famous auction house. The panel on which the painting had been executed had been pieced back together and beautifully restored, but under its freshly varnished surface lay a hidden flaw: a huge knot in the lower centre. When it was studied by technical panel specialists in Florence, they said it was the worst piece of wood they had ever seen.

CHAPTER 2

The Walnut Knot (#litres_trial_promo)

The countryside north of Milan sweeps slowly up towards the still blue lakes and then the jagged outline of the Alps. Before the land rises to alpine heights there are foothills and farmland that were once dotted with walnut trees, whose thick canopies of smooth-edged leaves shuffled in breezes and shook in winds. Their dense webs of branches broke up the hot sunlight, and farmyard cats scratched their backs on the treesвЂ™ distinctive, deeply furrowed dark bark. The trees grew quickly, developing thick trunks вЂ“ up to two metres in diameter вЂ“ and lived up to two hundred years. They are mentioned in medieval Italian legends about female shamans who summoned the spirit world by dancing around them. Millennia earlier, according to Roman myth, Jupiter, the most powerful of all the gods, subsisted on walnuts when he walked among men.

In his notebooks, Leonardo studied the structure of the walnut and other trees in the same way he studied so many other phenomena of the natural world. He observed how the colouring of the leaves was a product of four things: direct light, lustre (reflected light), shadow and transparency. He went on to analyse more complicated principles governing the structure of trees. He discovered one of the basic mathematical laws of their growth, that the combined size of a treeвЂ™s branches is equal to the width of its trunk, and the smaller branches that spring from larger ones follow the same proportional rule. At the heart of LeonardoвЂ™s life work was this pairing of the minutely detailed observation of nature with an understanding of the principles governing the appearance and behaviour of things, which today we call empiricism. For Leonardo, something had to be understood before it could be drawn. In a note dated April 1490 in his largest set of notes, the Codex Atlanticus, he wrote: вЂ?The painter who merely copies by practice and judgement of the eye, without reason, is like the mirror, which imitates within itself all the things placed before it without cognition of their existence.вЂ™ In LeonardoвЂ™s paintings, the detail can be overwhelming. Each leaf, each fold of cloth, each curl of hair can be different from the one beside it, yet each may share the same formal structure.

LeonardoвЂ™s mind was poised between the medieval and the modern eras,* which is one of the reasons he is such an iconic and mysterious character today. His notebooks give the thrilling sensation that the modern idea of knowledge is being invented on their pages. The Codex Atlanticus contains, amid the drawings of machines, aeroplanes, weaponry and human anatomy on its 1,119 pages, enigmatic prophecies that double as riddles for court entertainment, a literary genre dating back to the Middle Ages.1 (#litres_trial_promo) For example: вЂ?There shall appear huge figures in human shape, and the nearer to you they approach, the more will their immense size diminishвЂ™ (shadows), and вЂ?You shall behold the bones of the dead, which by their rapid movement direct the fortunes of their moverвЂ™ (dice). He also predicted that вЂ?There will be many who will be moving one against the other, holding in their hands the sharp cutting iron. These will not do each other any hurt other than that caused by fatigue, for as one leans forward, the other draws back an equal space; but woe to him who intervenes between them, for in the end he will be left cut in piecesвЂ™ (a saw). The humble walnut tree, too, receives a mention here: вЂ?Within walnut trees, and other trees and plants, there shall be found very great hidden treasures.вЂ™ The walnut tree from which the single plank of wood was hewn on which the Salvator Mundi was painted was not concealing treasure, but it вЂ“ or at least the section used for our painting вЂ“ did hold its own secret: a deformity dangerous for artists.

For many years the tree from which the Salvator Mundi sprang would have performed its duty providing nuts for culinary and medicinal purposes. Its annual harvest would have enriched Renaissance pasta dishes such as spiced walnut linguine, or fig and walnut ravioli, or would have been combined with the tops of the bitter rue plant in concoctions to ward off the plague. Then one day the decision would have been made to sell the wood of the tree. It would have been dug up with spades rather than felled with an axe, since the best wood is near the base. Some of the timber would have been used to make ornate carved tables, chairs and caskets for the homes of noblemen. Other blocks would be reverentially carved into statuettes of saints and placed on the ends of choir stalls, or in the niches of altars. The finest parts would be used for the intricate Renaissance craft of intarsia, or wood inlay: different types of wood, each a different shade, were cut into delicately shaped strips to build sepia pictures of landscapes or religious scenes, which were set into cabinets and desks. This walnut tree was cut into planks for all these purposes, and a single plank, 45cm wide and 66cm high, would become our painting.

The walnut timber of the Salvator Mundi was brought on a cart to Milan, a city with a population of between 150,000 and 300,000 people. Three times the size of Florence, Milan was evolving in concentric rings, its population spilling out beyond the city walls into new suburbs. The nobles lived in high-walled palaces, with thick rusticated faГ§ades, behind which lay inner courtyards with trees and fountains and sculptures on pedestals, cut off from the noise of the street. The city skyline was dominated by the Duomo, the cathedral, in the centre, and in the north-west by the Castello Sforzesco, the palace of MilanвЂ™s ruler, Duke Ludovico Sforza. There were shipyards, taverns, bakeries, a debtorsвЂ™ prison, cloth and shoe shops. There were quarters specialising in different trades: one full of mills producing cloth and paper, or sawmills for cutting wood; another grouping artisans working with wool; another with metalworkers. There were 237 churches, thirty-six monasteries, 126 schools and over a hundred practising artists. Milan was, in LeonardoвЂ™s own sharp words, a вЂ?great congregation of peopleвЂ™ who were вЂ?packed like goats one behind the other, filling every place with fetid smells and sowing seeds of pestilence and deathвЂ™. There were periodic outbreaks of bubonic plague, which would one day kill several of LeonardoвЂ™s assistants. Leonardo, who was (at least in his own mind) an urban planner as well as an artist and scientist, concocted plans to redesign the city, but they never left the drawing board.

Somewhere in the narrow streets of Milan was the carpenter or panel-maker who supplied the wood for the Salvator Mundi. This kind of artisan was the first of several craftsmen involved in the execution of a Renaissance work of art such as the Salvator. They were often required to construct large and intricate surfaces for paintings, building up a flat surface from planks of wood connected with animal glues and grooved joints, and combining panels of different shapes into elaborate altarpieces with wings on hinges. But the creation of the walnut panel for the Salvator Mundi was a relatively mundane task, since it was cut as a single piece of wood; it is therefore all the more strange that it was so poorly executed.

Leonardo may well have ordered a batch of panels, since two other Milanese paintings of his on walnut wood have been scientifically analysed and shown to have come from the same tree. The size was standard for devotional paintings, for which there was a large demand among wealthy Italian families. Typical subjects were the Virgin and Child, various saints including John the Baptist, and Christ, carrying the cross, crowned with thorns or as the Saviour of the World. Such pictures were hung in the ownerвЂ™s bedroom or private chapel.

Wood has to be prepared for painting with various undercoats, just as canvas is usually primed. In fifteenth- and sixteenth-century Italy, this was sometimes done by the artistвЂ™s assistants, but often by the panel-makerвЂ™s workshop. The Salvator MundiвЂ™s panel was prepared more or less as Leonardo said it should be in his notebooks:

The panel should be cypress, pear, service tree or walnut. You must coat it with a mixture of mastic [also known as gum Arabic, a plant resin] and turpentine which has been distilled twice and with white [lead] or, if you like, lime, and put it in a frame so that it may expand and shrink according to its moisture and dryness вЂ¦ Then apply boiled linseed oil in such a way as it may penetrate every part and before it is cold rub it with a dry cloth. Over this apply liquid varnish and white with a stick вЂ¦

Florentine artists had their wood panels prepared with gesso, a chalky substance, but Leonardo, in common with Milanese painters, preferred a mixture of wood oil and white lead as the ground. He had his вЂ?sizedвЂ™ with a first layer of animal glue. Then two layers of undercoat were applied, one made of a recipe of lead white pigment, with little grains of soda-lime glass and a binding agent of walnut oil; the second of more white paint, mixed with some lead tin yellow and some finer glass. The result was a surface with an off-white colouring. The addition of glass was a familiar trick used by artists at the time to lift the brightness of their pictures and accelerate the drying of the paint. Light on a painting does not reflect only off the top surface of paint. If the layers are thin enough and partly transparent it can pierce through layers of pigment and be bounced back by fine granules of glass, creating an effect of translucence. For the final process of the preparation вЂ“ I confess I do not know if this was applied in the case of the Salvator Mundi вЂ“ Leonardo advised вЂ?then wash it with urine when it is dry, and dry it againвЂ™.

But the panel-maker had done an exceptionally poor job. Deep within the prepared panel, unbeknown to the artist who was about to receive it, behind the preparatory layers of oil, gesso and urine lay a hidden problem. Unlike the walnut panels on which Leonardo painted other famous portraits such as La Belle FerronniГЁre and Lady with an Ermine, the SalvatorвЂ™s panel contained a large knot in the lower half, right in the centre. Such knots were usually filled in with vegetable fibres, wood filings or fabric, as the Florentine artist Cennino Cennini advised in his fifteenth-century painterвЂ™s manual. But, in a second oversight, difficult to reconcile with the expertise of Renaissance woodworkers, who well knew the properties of their materials, that was not done to this piece of wood.2 (#litres_trial_promo) It seems that either the panel-maker or an assistant in LeonardoвЂ™s workshop to whom the task had been delegated was careless with the selection and preparation of the wooden panel, and the defect was then hidden under layers of primer.

Even so, Leonardo would surely have taken a look at the back of the panel and seen the knot. The likelihood of that raises a second puzzle. Leonardo is known to have been interested in the technical aspects of making a painting. It seems out of character for him to accept such a flawed surface to paint on, especially if the work was destined for an important client. In humid and dry conditions a knot like this expands and contracts at different speeds from the rest of the wood, so that if the panel, looking far ahead into its future, became dried out, or wet, it would push and pull, perhaps taking the panel to breaking point, and creating splits and cracks. Alternatively, a knot is a weak point, so that if the picture was one day to be knocked or dropped, it could split around the knot. The knot in the walnut panel on which the Salvator Mundi was painted was a gnarled, ticking time bomb.

* (#ulink_32baea56-8899-5947-9f08-1eb323b367f6) Historians see the вЂ?modernвЂ™ period as beginning around 1500. Often they refer to the sixteenth and seventeenth centuries as вЂ?early modernвЂ™.

CHAPTER 3

Buried Treasure (#litres_trial_promo)

Squinting at a computer screen one day in his home office, Alex Parish discovered the Salvator Mundi. It was listed for sale in an online catalogue of an obscure auction house in New Orleans, the St Charles Gallery. This was in 2005, three years and a few months before Robert Simon would board his flight to London carrying the painting under his arm. Parish thought the picture looked promising, and the price was so low that it was worth taking a small risk. He remembers: вЂ?I had a recollection of a similar thing that had come up with SothebyвЂ™s a few years before. I bought the picture because I know this is just the sort of thing other people like to speculate on.вЂ™ He contacted Simon, who had himself also spotted the picture, as he subscribed to the galleryвЂ™s mailing list and received a hard-copy catalogue by post. Parish suggested they buy it together, fifty-fifty, the same way they had jointly bought many works before. Simon agreed.

Until he discovered the Salvator Mundi, Parish was a small-time Old Masters dealer whose career in the art world had been full of false starts, along with the treadmill of low-value backroom sales.

The art world has a glamorous image as a global nomadic court presided over by latterday kings and queens вЂ“ the blue-chip gallerists (gallery owners), artists whose work fetches million-dollar-plus auction prices, and multi-millionaire collectors, around whom swarm smaller galleries and dealers and emerging artists. In the second half of each year the entourage moves en masse from art fair to art fair: Basel, the FIAC in Paris, TEFAF in Maastricht, Frieze London, the Armory and Frieze New York, Hong Kong, Miami, taking in auctions in London and New York on the way, in a blaze of parties and packing cases.

And yet, this is only the sparkling surface. Behind the scenes are many other people who are not born into riches, who do not have a large designer wardrobe or a taste for high society, and who are drawn into the art business not so much by a love of art, which everyone gives as their primary motivation, but by their hunger for an experience much more exciting, akin to gambling or hunting for buried treasure. For them, the attraction is the exhilaration of buying a painting from the first show of an unknown graduate artist, in the hope that five years later he or she will be part of a group show in a public institution. Or, as is the case in our story, coming across, after years of searching, an old painting ascribed to a third-rate provincial school but which, they believe, might be by an artist of great renown.

Such successes are far from guaranteed. Like any other industry to which people are drawn by the glow of fame and fortune emanating from those at the top, the art world has a very narrow peak of achievement and a wide base of footsoldiers, bottom-feeders and also-rans. One of those at the base of the hierarchy was Alex Parish. As he himself says, вЂ?IвЂ™ve been down to a suitcase more than once in my life.вЂ™ Born in 1954 into a lower-middle-class American family, he majored in art history at Ohio Wesleyan University and then moved to New York, where he worked in the gift shop of the Museum of Modern Art. He left after two years and tried unsuccessfully to set himself up as a dealer, but вЂ?through a combination of zero training, zero initiative, a certain amount of youthful lack of discipline, etc., I ground to a halt after a few yearsвЂ™. He went to London in the early 1980s and took a one-year course in the art market, not at a prestigious establishment like SothebyвЂ™s Institute of Art, but at a private school, the New Academy for Art Studies, run by art historians Lucy Knox and Roger Bevan. When he returned to New York, he worked for a while in another gift shop, this time at the Metropolitan Museum of Art, and then вЂ?begged to get the shittiest job at the shittiest auction house in New York City, and managed to do it. I worked there for two years and ended up writing their catalogue.вЂ™ While he was there he succeeded in identifying an interesting-looking undervalued painting that had been consigned to auction, the kind of painting known in the trade as a sleeper. The Salvator Mundi can well lay claim to being the greatest sleeper ever discovered.

The painting Parish spotted was a seventeenth-century Dutch pastoral scene, which he brought to the attention of the renowned Old Masters gallery Colnaghi. It was a gesture that displayed an appropriate combination of knowledge and ambition. Colnaghi took him on, and he worked for them in New York for two years, from 1980 to 1982, but not in a high-profile position. It was not an easy business in those days, he recalls. вЂ?No one was selling old Italian pictures or English pictures, or anything like that, in New York at the time.вЂ™ After a couple of years he went to work for ChristieвЂ™s. It was another low-paid job, but he was becoming increasingly fluent in the lingo of art market insiders: вЂ?I was essentially the guy on the floor, taking the pictures into the back room, black-lighting them [putting them under an ultraviolet light to show up how much over-painting had been done], turping them down [cleaning them with turpentine], showing them to all the trade [that is, not to private collectors but to dealers and gallerists, who usually get the first look at new arrivals].вЂ™ He had one further invidious task: вЂ?I was the one who always got sent down to the front counter to tell people that their van Dyck was really not what they thought it was, and thank you for coming.вЂ™

At ChristieвЂ™s, Parish found once again that he had a talent for spotting sleepers. вЂ?I was working late one night in 1985,вЂ™ he remembers. вЂ?I was the only person around from my department, and a picture came in. I got a call from a girl downstairs, вЂњPlease come take a look at this painting before you leave.вЂќ I went down and there was an enormous picture, four feet by six feet, with a couple of mirrors, just dropped off by some picker.вЂ™ A вЂ?pickerвЂ™ is a dealer-middleman who buys from myriad regional auctions, from the estate sales of deceased collectors and from antique shops across the United States, and then takes the works to New York and consigns them for sale, hopefully for a higher price. вЂ?I looked at it, and I was like, вЂњOh my God, this could be by Dosso Dossi.вЂќвЂ™ You need a thorough knowledge of sixteenth-century Italian painting to know a Dosso Dossi when you see one. He is one of those few artists, like El Greco or Gustave Moreau, who seem to exist outside history. His mysterious paintings of obscure allegories and mythological scenes, featuring magicians, pygmies and unicorns alongside the more conventional array of saints and madonnas, all bathed in the gentle, golden evening light of Venice, reach forward from the Renaissance to the Primitivism and Surrealism of the twentieth century.

вЂ?So I told the girl, вЂњDonвЂ™t tell anyone about this. It could be worth $100,000,вЂќвЂ™ Parish told me. вЂ?And I called my boss, who was still over at the main building, and I said, вЂњI think thereвЂ™s a Dosso in the warehouse.вЂќ And he was totally dismissive. вЂњShut up. Get back to work.вЂќ End of story. What was I to say? IвЂ™m just a flump. He was an expert. So I totally forgot about it. About two weeks later, IвЂ™m in a meeting with someone, and I get a call from him and he says, вЂњOh my God, thereвЂ™s a Dosso in the warehouse.вЂќ And IвЂ™m like, вЂњYes.вЂќвЂ™ ParishвЂ™s deadpan indicates a life full of rejections because he didnвЂ™t come from the right social strata for the art world.

Experiences like these led Parish to an epiphany. вЂ?The pickers and runners would arrive at ChristieвЂ™s with a truckload of paintings, and I would value each picture. IвЂ™d look at what they had and it was like, вЂњNo, thatвЂ™s $4,000. ThatвЂ™s $2,000. We donвЂ™t want that, we donвЂ™t want that, we want this.вЂќвЂ™ He could see that most of the runners did not know enough about art history to know what they were buying. вЂ?I saw a gap in this supply chain for someone who had the knowledge to go out and look in the backwaters of America.вЂ™

So he set himself up once again as an independent dealer, specialising in Italian painting. Once again, it didnвЂ™t work out. It was still difficult to find buyers for the Italian pictures he unearthed. In the meantime, his wife gave birth to triplets and he moved out of New York to a larger house. He now had a large family and a small income. It was a hand-to-mouth existence, buying old paintings and then вЂ?shovellingвЂ™ them through the auction houses. It was around this time that he became a born-again Christian, a highly unusual commitment for someone in the art world.

Help came around 1996 in the form of a phone call from the largest Old Master dealership in the world, founded by Richard Green. Green has galleries on Bond Street in London, but was looking for someone to find paintings for him in the United States. вЂ?In their heyday, they were flipping,вЂ™ says Parish вЂ“ using another art market term, this time referring to fast-turnaround buying and selling вЂ“ вЂ?something along the lines of six hundred pictures a year вЂ“ two hundred at fairs, two hundred through their galleries and two hundred through auctions.вЂ™ Parish worked for GreenвЂ™s son Jonathan, who told him, вЂ?Go and look for pictures for us.вЂ™

Jonathan Green sent Parish into the hinterlands of America to scour auction houses, estate sales and remote regional galleries for promising works of art. вЂ?I needed to be trained at first, because I didnвЂ™t know anything about the breadth of merchandise they bought, but it turned out to be a happy marriage because I didnвЂ™t hugely affect the bottom line there,вЂ™ Parish told me, indicating that his salary was modest. Meanwhile, his contract permitted him to buy and sell works of art for himself on the side, although a gentlemanвЂ™s agreement meant his employer got first refusal. In addition to travelling, he subscribed to trade newspapers and catalogues, going through them and asking for Polaroids of any pictures that looked promising. But, he says knowingly, вЂ?Within a few years the digital revolution totally reinvented this business.вЂ™

At the time, the United States was awash with paintings whose value their owners did not have a clue about. From the late nineteenth into the middle of the twentieth century, American collectors had вЂ?vacuumed upвЂ™ European Old Master paintings, usually buying from impoverished European aristocrats whose wealth had been eroded by the recessions of the late nineteenth century and the 1930s, and by the two World Wars. вЂ?All the Americans were desperate for class, and all the Europeans were desperate for money,вЂ™ says Parish. This was the era in which the precursors of todayвЂ™s billionaire art collectors, robber barons like J.P. Morgan, Andrew Mellon and John Rockefeller, amassed peerless collections which later formed the foundations of the countryвЂ™s great museums. But less prominent middle-class families also collected. The paintings they bought were often unsigned and in poor condition. Over the years they had been damaged, become the victims of misguided restoration, and been passed down from generation to generation until they reached the hands of people who werenвЂ™t interested in art. вЂ?These pictures were finally starting to bubble up into the market.вЂ™

Thus was born a perfect storm of lightning-fast information technology, surging supply and deep demand. Parish was a like a meteorologist who tracked the new commercial climate. вЂ?There was this frontier in terms of Old Masters, where all these pictures were coming up and no one knew what they were being sold, and I was looking at that frontier.вЂ™

Parish acquired from a colleague a database of five thousand auction houses across America. He whittled the list down to about a thousand that sold paintings. If the auction houses didnвЂ™t upload online or send out hard-copy catalogues, Parish got on their electronic mailing lists and asked for jpegs of anything that looked interesting. вЂ?I was in a tiny office, surrounded by books, and I spent вЂ“ IвЂ™m not kidding you вЂ“ fourteen hours a day going through this thing. Hunting, hunting, hunting. I mean, literally: click, click, click, click. I was not going to let a picture sell in this country that I didnвЂ™t know about.вЂ™

Soon Parish was buying a painting a week for Green, using this database. Green requested вЂ?sporters and nauticalвЂ™ (that is, paintings of sporting scenes and sailing ships) or вЂ?Victorian and silks and satinsвЂ™ (eighteenth- and nineteenth-century portraits of noblemen and ladies dressed in expensive fabrics). The art market had embraced the online database, and Parish was poised to show what a powerful tool it could be.

Parish often turned to other dealers he trusted, like Robert Simon, to share the financial risk of buying works in which Green wasnвЂ™t interested.* At his peak Parish was holding stakes in up to seventy pictures over the course of a single year, taking 50 per cent, 33 per cent, and occasionally 25 per cent shares in the purchases. It was a very hit-and-miss business. вЂ?If I had a picture for $1,500 and it brought $15,000 at auction, then that to me would be like, вЂњHallelujah!вЂќ I had a couple of years in a row where I would land one picture, be it for $500 or $5,000, and it would come back at about $100,000. It was really great. I think I did that three or four times in a row.вЂ™ But there were also times when pictures Parish bought and consigned to auction did not sell. вЂ?ItвЂ™s difficult, particularly when youвЂ™re buying from the internet and youвЂ™re buying from small photographs, which is what the trade had evolved into. You have to вЂњspecвЂќ from photos. And it is speculation. A certain percentage of them, when you see them in the flesh, are stinkers. They come back to punch you in the nose. I was selling those things off at whatever price I could get, 99 per cent of them at a loss, just to get some seed capital back.вЂ™

And then one day Parish was clicking away as usual when he spotted the listing for the Salvator Mundi in an online catalogue from the St Charles Gallery in New Orleans. It was Item 664. вЂ?After Leonardo da Vinci (Italian, 1452вЂ“1519)вЂ™ it began, and then, вЂ?Christ Salvador Mundi, oil on cradled panel, 26 inches by 18ВЅ inches.вЂ™ Was the misspelling of the Latin вЂ?SalvatorвЂ™ perhaps due to a Spanish-speaking typist? вЂ?Presented in a fine antique gilt and gesso exhibition frame.вЂ™ The estimate вЂ“ an auction house always states the price it thinks the lot may achieve вЂ“ was just $1,200 to $1,800. The painting was illustrated in the hard-copy catalogue that Robert Simon saw at the same time, with a very low-resolution black-and-white photograph. ChristвЂ™s clothes had become a gloomy grey, his cheekbones and forehead glimmered oddly out of the murky darkness, and the fingers of his blessing hand seemed illuminated by pale candlelight. вЂ?It looked kinda interesting. School of Leonardo is always interesting, and the price was very good,вЂ™ Parish told me with a grin.

Parish asked the St Charles Gallery down in New Orleans to send him a photograph. вЂ?When it arrived, I pulled it out, I held the picture, and in an instant I could see, like any Old Master dealer can, this part is totally repainted, this part is pretty much untouched, and this part, which included the hand, was like, вЂњOh my God, thatвЂ™s period! ThatвЂ™s period.вЂќ You know what that means? Period means itвЂ™s of the era itвЂ™s trying to be. You see seventeenth-century rehashes of Renaissance pictures, nineteenth-century rehashes of Renaissance pictures. This was clearly of the era it purported to be from. And it was pretty good quality. IвЂ™m looking at the hand and IвЂ™m looking at the drapery and I can clearly see this is not simply one of numerous copies. This is an extremely good, high-quality copy.вЂ™

He and Simon decided to buy it. The rest, as they say, is art history.

Nothing in the known universe, no item, object or quantity of material, has ever appreciated in value as fast as the Salvator Mundi attributed to Leonardo da Vinci. It was sold in May 2005 to Simon and Parish for $1,175 вЂ“ a sum considerably less than the figure of вЂ?around $10,000вЂ™ the pair later quoted to the media. In 2013 they sold it for $80 million, then four years later, in 2017 вЂ“ a mere twelve years and six months after it was sold for not much more than $1,000 вЂ“ it was auctioned by ChristieвЂ™s New York for $450 million.

* (#ulink_9deb3986-db06-5284-a0b2-c1cfe13bdbd0) Jonathan Green recounts a story of how he found himself in a taxi with Parish in London in the mid-2000s. Parish pulled out his mobile phone and showed Green a detail of a blessing hand. It was from the Salvator Mundi, but Green didnвЂ™t know that. вЂ?What do you think of this?вЂ™ he asked nonchalantly. Green nodded appreciatively. Green says Parish never offered him the painting, and told me, with magnanimity, вЂ?I donвЂ™t hold anything against him.вЂ™ Parish has a different version of the story. вЂ?I had bought the Salvator Mundi at least a year or two prior to leaving Green, and IвЂ™d mentioned it to them a couple of times, but they were so contemptuous of me in some respects. You know, вЂњJust, shut up. Go get us coffee.вЂќ That kind of tone of voice. So, OK. Okie dokie вЂ¦вЂ™ Parish drew out the last two words with his excellent drawl, and never finished the sentence.

CHAPTER 4

Paper, Chalk, Lapis (#litres_trial_promo)

Leonardo was the most prolific draftsman of his age, with approximately four thousand surviving drawings attributed to him, four times the number left by his most active contemporaries.1 (#litres_trial_promo) He drew diagrams, emblems, allegories, architecture, anatomy, maps, landscapes, biblical figure groups, nude studies and portraits from life. He was an expert in silverpoint, using a hard-edged metal stylus to draw lines into paper covered with a mixture of pulverised bone and mineral colours. He liked ink and quill pens plucked from the wings of domestic geese. After the turn of the sixteenth century he preferred chalks: red, black and white. He often touched up his drawings with white highlights in yet another medium, gouache. Some of LeonardoвЂ™s early paintings, St Jerome and Adoration of the Magi among them, progressed little beyond the full-size drawing stage.

As a draftsman, Leonardo was a revolutionary. To him we owe the worldвЂ™s first dated landscape sketch, the worldвЂ™s first вЂ?explodedвЂ™ diagram of machine parts, and the worldвЂ™s first freeform compositional sketches, in which he plans вЂ“ or perhaps rather finds вЂ“ a composition out of a rapid-fire maelstrom of spontaneous, half-automatic lines, scribbled in ink and chalk. One of his most famous and most reproduced works is a diagrammatic drawing, Vitruvian Man, in which a manвЂ™s body with extended limbs forms a square and a circle. According to the sixteenth-century Italian writer Giambattista Giraldi Cinzio, citing the reminiscences of his father, who had observed Leonardo first-hand, the artist rarely left his studio without a sketchbook hanging from his belt. In his notes for his treatise, Leonardo issued the first known exhortation about drawing from real life:

As you go about town, be always alert when out walking, to observe and consider the actions of men while they are talking, thinking, laughing or fighting together, what actions are within them, and what actions the onlookers are doing вЂ¦ and make brief notes of these forms in your small notebook, which you must always carry with you, and it should be of tinted paper, so that it cannot be erased, and must be kept diligently, because the positions and actions are many, and the memory is unable to remember them all.

The surviving studies for the Salvator Mundi, however, which are drawn in red chalk on red tinted paper, were executed in the studio, because they were sketches of clothing вЂ“ or drapery, to use the art historianвЂ™s terminology вЂ“ and they were almost certainly based on draped mannequins, not live models. Today these drawings can be found in the Royal Collection at Windsor Castle.

вЂ?Leonardo sometimes made clay models,вЂ™ wrote Giorgio Vasari, the great sixteenth-century Florentine art historian of the Renaissance, вЂ?draping the figures with rags dipped in plaster, and then drawing them painstakingly on fine Rheims cloth or prepared linen.вЂ™ Drapery was one of the essential components of Renaissance painting, and acted as a form of messaging in itself. The classical robes in which the saintly starring cast of Renaissance paintings were dressed elevated biblical stories to the level of the Antique, fusing the two great sources of wisdom of the age, the Bible and classical civilisation. Their sheen, dips and pleats were bravura exercises in realism, which advertised the illusionistic skill of the artist. There is a series of sixteen drapery studies drawn on linen, usually dated to the early 1470s, some attributed to Leonardo at the tender age of nineteen. The young artist shows the texture and characteristics of the fabric depicted as well as indicating the body underneath, the cloth flowing with curving arabesques and hard-edged angles, receding in pockets of shadow, and gleaming where it catches the light.

Leonardo usually planned his paintings with three stages of drawings. First, there were the studies of body parts, gestures, faces, drapery, anatomy and landscapes, drawn from life or sometimes from models or classical statues. In a second stage, he made sketches of combinations of figures or laid out the entire composition. Last came full-scale cartoons, which were traced onto the panel on which the final painting would be executed. There must have once been many preparatory drawings for the Salvator Mundi вЂ“ for ChristвЂ™s face, the blessing hand and the orb, and perhaps for the entire composition вЂ“ but only two pages of sketches survive. On one sheet there are two drawings вЂ“ one of a manвЂ™s torso clothed with an episcopal garment known as a stole, and the other a smaller depiction of a forearm emerging from a rich crumple of sleeve, drawn in red chalk and then overdrawn in white. On the second sheet is a forearm with a sleeve finishing in a cuff, with drapery around it.

These sketches provide a host of intriguing clues about the Salvator Mundi. The fabric covering the chest is drawn in obsessive detail, one of the characteristics of LeonardoвЂ™s style, with thin rivulets of cloth, each one differentiated, running down from the band of embroidery around the neck, which has bunched up the fabric in tiny pleats. Looking at the painting, on the left side of the chest, just above a diagonal band, the garmentвЂ™s fabric has become curiously scrunched. The artist seems to take particular care in showing how untidy this part of the clothing is. The shape and position of this crumple is momentous. At exactly the spot where the Holy Spear pierced ChristвЂ™s body on the cross, the wound of the Passion, it forms the Greek letter omega, a symbol of the divine. Novelists and historians of varying academic qualifications have written numerous outlandish interpretations of hidden symbols they have discerned by carefully squinting at LeonardoвЂ™s paintings, such as the Virgin of the Rocks and the Mona Lisa, but here in the Salvator Mundi there is a real one.

Other aspects of these sketches muddy the artistic waters of attribution. The forearm on this same page seems to have been drawn not by Leonardo but by another artist entirely, surely one of LeonardoвЂ™s assistants. In the 1930s, the great Leonardist Kenneth Clark catalogued the collection of LeonardoвЂ™s drawings owned by the British royal family, which included both of these sketches. He observed that the draftsmanship of the forearm is heavy-handed compared to the chest, and that, furthermore, the hatching runs left to right, while LeonardoвЂ™s always runs right to left, as one would expect of a left-handed artist.

The second drawing holds a puzzle too. The sleeved limb emerges from two loose loops of fabric, which closely resemble the drapery around ChristвЂ™s arm held up in blessing in the painting. But in the drawing the forearm is sleeved with a cuff at the end; in the painting it is bare. As a preparatory study it bears a surprisingly loose relationship to the finished painting.

We can vaguely date both drawings to the first decade of the sixteenth century, because of the evolution of LeonardoвЂ™s style and technique. He spent most of his early career sketching in pen and ink or silverpoint. In the mid-1490s he began using red chalk for studies for the apostles in The Last Supper. In the first decade of the sixteenth century, chalk became LeonardoвЂ™s primary drawing medium. The material was better suited to the style he was developing. ChalkвЂ™s softness allowed him to intensify his sfumato, the most gradual light-to-dark transitions which became the hallmark of his painting.2 (#litres_trial_promo) It is in this later drawing style that the preparatory sketches are executed.

Drawing is the common denominator between all of LeonardoвЂ™s diverse activities as engineer, scientist and artist. And yet Leonardo had criticisms of drawing. One of the fundamental aspects of his thinking, which set him apart from his contemporaries, was his radical attitude to line. вЂ?Lines are not part of any quantity of an objectвЂ™s surface, nor are they part of the air which surrounds this surface,вЂ™ he wrote. вЂ?The line has in itself neither matter nor substance and may rather be called an imaginary idea than a real object вЂ¦ Your shadows and lights should be blended without lines or borders in the manner of smoke losing itself in the air вЂ¦ O painter, do not surround your bodies with lines!вЂ™ There were no lines in the real world, he said, so donвЂ™t paint them.

In the cool and pungent backstreets of Milan, in the dark shops of the apothecaries, majolica vases lined the shelves, full of herbs, medicines, chemicals and pigments вЂ“ the raw material for colouring the world. These were roughly chopped preparations of minerals, insects, animal remains and plants, waiting to be finely ground into powder, mixed with egg yolk or oils to make paint, and with water for dyes. The customers came and went вЂ“ dyers, glassmakers, tailors, the manufacturers of ceramics and furniture, manuscript illuminators and painters.

Behind every Leonardo painting lay a global network of anonymous collaborators, with professions far removed from the creative arts. The minerals for pigments came in ships from distant Central Asian cities that few Europeans had seen, often via Syrian merchants. Some were manufactured in Venetian or Florentine laboratories run by religious orders. There was ultramarine powder ground from blue-veined chunks of lapis lazuli by the Jesuits of the Florentine Convent of Santo Giusto alle Mure; the semi-precious rock was imported from what is now Afghanistan and Uzbekistan, via Damascus. A more sensibly priced version of the same colour, from the same convent, was made of azurite acquired from Austrian and Balkan mines and manufactured with copper oxide. The chromatic reputation of these priests was so high that the Florentine contract commissioning the Adoration specified that Leonardo had to buy his colours from them. A red pigment came from the dried bodies of kermes lice from the eastern Mediterranean, mixed with water, alum and soda. Another came from boiled brazilwood, which Spanish and Portuguese merchants imported from the Latin American colonies. A third red, вЂ?dragonвЂ™s bloodвЂ™, was a resin derived from various plants, and was used both as a medicine and a varnish. Cochineal was a scarlet named after the insects from which it came, and was imported to Italy via Antwerp. Rubies, which could be ground down into an expensive colour, were available too. White, ochre, and yet another red came from different treatments of lead. A dark вЂ?bone blackвЂ™ came from a distillation of carcasses. Verdigris, a green familiar to us as the patina on old copper, was obtained by exposing copper plates to vinegar. Gold leaf was made from old coins, the thin sheets carefully placed between sheaves of paper in books. Saffron was used to make an intense yellow colour when mixed with alum and egg yolk. Thus, science and trade formed a basis for art.

Leonardo would probably have sent one of his teenage apprentices to buy the pigments, a shopping list in his hand. The artistвЂ™s notebooks contain to-do lists, often compiled before a long journey, which give an indication of the errands his вЂ?boysвЂ™ had to run. One, from 1490, reminds the apprentice to get hold of вЂ?a book that treats of Milan and its churches, which is to be had at the stationers on the way to Cordusio [a piazza in the centre of the city]вЂ™. Another, from the years 1508 to 1510, quite possibly the time when Leonardo began to work on the Salvator Mundi, lists вЂ?boots, stockings, comb, towel, shoelaces, penknife, pens, gloves, wrapping paper, charcoal, spectacles with case, firestick, fork, boards, sheets of paper, chalk, wax, forceps вЂ¦вЂ™ This list may refer to items he had already bought from MilanвЂ™s shopkeepers and kept in his studio, but Leonardo does add a note about one thing that he clearly didnвЂ™t have: вЂ?Get hold of a skull.вЂ™

For the Salvator Mundi, the apprentice would have had only a small number of pigments on his list, because this painting was made with remarkably few colours: lead white, lapis lazuli, lead tin yellow, vermilion, red iron oxide, carbon and charcoal black, bone black and umber. Back in the studio, the assistants would then have to grind the colours to create a fine powder. However, on this occasion, as later restoration showed, they didnвЂ™t do a very thorough job: the brilliant blue grains of the lapis lazuli were rather coarse compared to those in LeonardoвЂ™s other paintings.

There was probably a cartoon by Leonardo for the entire composition of the Salvator. This would have been pricked with tiny holes, or spolveri. The cartoon was laid on top of the panel, dusted with fine powder and then removed. An outline of the composition, traced by the dark dust seeping through the pinpricks, remained. Microscopic photographs of the Salvator Mundi have revealed a handful of tiny black dots, but only enough to raise the possibility, not the certainty, of a cartoon. The artist definitely used a pair of compasses to make the circle of the orb, because there is a hole where the compass point went in. Then another layer of underpainting was added in thin, semi-transparent washes of browns and blacks, some derived from charred wood, others from charred bones.

Leonardo was a member of the Arte dei Medici, Speziali e Mercai вЂ“ the Guild of Doctors, Apothecaries and Mercers. He had his own recipes for making colours, and he listed many of them in his notebooks. That was unusual for a Renaissance painter, but it fits our knowledge of Leonardo the artist-scientist. The master of light and shade was particularly interested in the variety of ways he could mix colour for shadows: вЂ?Take green [i.e. malachite] and mix it with bitumen, and this will make the shadows darker. And for lighter shades mix green with yellow ochre, and for even lighter green with yellow, and for the highlights pure yellow. Then take green and turmeric together and glaze everything with it вЂ¦ to make a beautiful red take cinnabar or red chalk or burnt ochre for the dark shadows, and for the lighter ones red chalk and vermilion, and for the highlights pure vermilion, and then glaze with fine lake.вЂ™

We donвЂ™t know how the artist of the Salvator Mundi prepared his palette, but there is a description by Vasari of the way another artist, who was taught in the same studio as Leonardo, did. Lorenzo di Credi and Leonardo were both trained by the Florentine master Andrea Verrocchio, and sometimes worked on the same pictures together. Di Credi, says Vasari, вЂ?made on his palettes a great number of colour mixtures, so that they went gradually from the lightest tint to the darkest, with exaggerated and truly excessive regularity, so that sometimes he had twenty-five or thirty on his palette, and for each of them, he kept a separate brushвЂ™. Such preparation would also have been necessary for the delicate, painstaking and time-consuming manner in which the Salvator Mundi was painted.

Now Leonardo could pick up his brush and begin to paint вЂ“ should he have had the inclination, of which we cannot be certain. Unlike every other picture Leonardo is widely recognised to have executed after his fame was established, there is no documentary evidence that his hand ever painted the Salvator. That is not in itself an unusual problem for a Renaissance painting. Thousands of artworks before 1700 were unsigned and undated, leaving art historians with thousands of picture-puzzles to solve. The tool of connoisseurship was developed two centuries ago specifically to tackle this problem. But it is a process which art dealers such as Robert Simon and Alex Parish cannot undertake on their own, since however gifted they might be as connoisseurs, they are potentially compromised by commercial motivations. Thus, it was time to call in the experts.

CHAPTER 5

Zing! (#litres_trial_promo)

Martin Kemp is a powerful academic, who positions himself a streetwise scholar, resistant to the elitism of the art world, not afraid to defend his corner. When he speaks, the sentences are elegantly formed and the insights вЂ“ usually about Leonardo вЂ“ are admirably precise, but the delivery is stern, as if to ward off anyone who might disagree.

Despite all his decades of scholarly study, he tells journalists modestly that he is just in вЂ?the Leonardo businessвЂ™, although he has written an autobiographical account of his adventures in it, Living with Leonardo. He professes to be understanding of, even apologetic towards, people who have misunderstood the artist to whom he has dedicated his academic career: вЂ?It is worth remembering that many of those who have developed untenable Leonardo theories have invested a large amount of time and emotional commitment in their researches,вЂ™ he once wrote sympathetically. вЂ?I have endeavoured to respond in an understanding manner, although I fear I may have been overly abrupt on occasion.вЂ™1 (#litres_trial_promo)

Kemp first studied the sciences at Cambridge University before switching to history of art вЂ“ an early change of course which some of his academic rivals have used against him, but which placed him in a well-nigh perfect position for the study of the ultimate artist-scientist. He taught at various art history departments in Britain and North America before becoming a professor at Oxford in the 1990s. In 1981 his masterwork was published, Leonardo da Vinci: The Marvellous Works of Nature and Man. It slotted seamlessly into over a century of Leonardo historiography by bringing together LeonardoвЂ™s scientific studies and his artistic career.

From Giorgio Vasari, the sixteenth-century Florentine author of Lives of the Artists, until the nineteenth-century essayist, novelist, literary theorist and art critic Walter Pater, Leonardo scholars had focused almost entirely on the paintings. That changed in 1883, when the reclusive German Leonardist Jean Paul Richter published meticulous transcriptions of LeonardoвЂ™s papers organised according to themes, such as his writings on art, mechanics, anatomy and water, as well as his letters. RichterвЂ™s apposite choice of title was The Literary Works of Leonardo da Vinci. In the 1930s Kenneth Clark contributed a useful catalogue of the Leonardo drawings held in the British Royal Collection and a biography, but that was a sideshow compared to the monumental post-war work of Carlo Pedretti, the Italian professor of Leonardo studies at UCLA who taught himself to read LeonardoвЂ™s handwriting as a teenager, and who at the height of his fame would arrive for lectures in a helicopter. In Leonardo: A Study in Chronology and Style, published in 1973, Pedretti arranged around seven thousand surviving pages of LeonardoвЂ™s twenty-five extant notebooks in a convincing chronological order.

Kemp picked up the baton from Pedretti. He analysed the notebooks and paintings and evolved a coherent and impressively simple model вЂ“ вЂ?a common coreвЂ™, he called it вЂ“ for LeonardoвЂ™s thinking and a narrative for how it developed. For Kemp, LeonardoвЂ™s creativity combined observation, intellect, invention (fantasia) and convention (decorum). Leonardo, said Kemp, set out with the purpose of understanding the mathematical and scientific principles that underlay the natural world, anticipating that there must be a common set of laws that applied to all phenomena:

Those authors who have written that Leonardo began by studying things as an artist but increasingly investigated things for their own sakes have missed the point entirely. What should be said is that he increasingly investigated each thing for each otherвЂ™s sake, for the sake of the whole and for the sake of the inner unity, which he perceived both intuitively and consciously. In moving from church architecture to anatomy, from harmonic proportions to mechanics, he was not leaping erratically from one separate branch to another, like a frenzied squirrel, but climbing up different branches of the same tree.2 (#litres_trial_promo)

Then, at the end of his life, Kemp argued, Leonardo changed his tune. He became convinced that nature was too diverse and mysterious to be grasped, and this was reflected in his stunningly dynamic series of late drawings of floods and tempests.

In the almost four decades since Marvellous Works, Kemp has published a profusion of scholarly articles and catalogue essays about the intersection of science and art in the work of Leonardo and in the broader Renaissance culture. He has also been active in the less austere world of exhibitions and television documentaries, often involving the reconstruction of a working model based on one of LeonardoвЂ™s designs. He has plans for a contemporary dance performance, an orchestral recital and a CD of music related to Leonardo, while he works on a new scholarly edition of one of LeonardoвЂ™s scientific notebooks, the Leicester Codex, owned by Bill Gates. He is Mr Leonardo. The intellectual has become in part impresario, and scholarship has merged with showmanship, a trend that can be observed across the entire art historical and museological community in recent times.

Martin Kemp had long been an outspoken critic of the methodology of connoisseurship and attributions in art history. In a lecture in The Hague he said, вЂ?The state of methods and protocols used in attribution is a professional disgrace. Different kinds of evidence, documentation, provenance, surrounding circumstances of contexts of varied kinds, scientific analysis, and judgement by eye are used and ignored opportunistically in ways that suit each advocate (who too frequently has undeclared interests).вЂ™13 (#litres_trial_promo) He has warned that commercial incentives and professional networks often trump scholarly reserve: вЂ?In extreme cases, curators of exhibitions might fix catalogue entries in the service of loans; museum directors and boards might bend their own rules.вЂ™4 (#litres_trial_promo) To his credit, Kemp has long refused to accept a fee, or even expenses, if he inspects a work of art (although some might point out that there are many other incentives, besides direct financial gain, to discover a long-lost work by the worldвЂ™s most famous artist). вЂ?As soon as you get entangled with any financial interest or advantage, there is a taint, like a tobacco company paying an expert to say cigarettes are not dangerous,вЂ™ he told the New Yorker magazine.5 (#litres_trial_promo)

Like many other Leonardists, Martin Kemp has been receiving scores of emails for years, вЂ?sometimes more than one a weekвЂ™,6 (#litres_trial_promo) he says, from individuals who think they own an unrecognised Leonardo. Some of these works are by LeonardoвЂ™s pupils, others are incompetent copies, and many have nothing to do with the artist. Most of the time he rejects the invitations to view the works; sometimes he can see from the images he is sent that the work is not a Leonardo. He knows that attributions are a murky business, and he has kept his distance. He says that he does not attribute works of art вЂ“ he researches them. Back in Marvellous Works he wrote that вЂ?The speculative attribution of unknown or relatively unknown works to major masters is a graveyard for historiansвЂ™ reputations.вЂ™7 (#litres_trial_promo)

But, as often as Professor Kemp has warned of the dangers of attribution, he is as human as any other Leonardist. For all his caveats about connoisseurship, he still finds it useful to deploy the mysterious and instantaneous power of the eye of the art historian: вЂ?The actual physical presence of a work of art is always very different from even the best photographic images вЂ¦ The first moments are always edgy. If a certain zing does not occur, the encounter is going to be hard going.вЂ™ Sooner or later, all the great Leonardo experts have been lured into the vortexes of authentication. That may be because no mortal, whether scholar or not, can hold out forever against the allure of beauty, money and fame. Or it may be because, over a long and distinguished career, it is impossible to avoid every patch of academic quicksand.

In March 2008, Kemp received an email with a jpeg file of a small drawing on parchment, 23 x 33cm. It was of a pretty young woman in profile, with piercing green-brown eyes and a delicate upturned nose. Her hair was swept back into an elaborate hairpiece, and there was a knotwork pattern on the sleeve of her garment, which was curiously plain and cheap. The picture had been bought at auction in 1998 for under $20,000 as a nineteenth-century work by a German artist, one of a circle which had been reviving and imitating Italian Renaissance painters.

Kemp thought it вЂ?zinged decisivelyвЂ™. He authenticated it as a Leonardo and named it La Bella Principessa, although there was no evidence that it was of a princess. Eventually he published a book about the painting, which he said depicted a bride, Bianca Sforza from the ruling family of Milan, for whom Leonardo worked, and that it came from a late-fifteenth-century bound vellum book in a Warsaw library which commemorated the wedding. He observed LeonardoвЂ™s hand in the left-handed cross-hatching, the glassy pupils and traces of fingerprints. вЂ?Leonardo has evoked the sitterвЂ™s living presence with an uncanny sense of vitality,вЂ™ he said.8 (#litres_trial_promo) However, Leonardo had never done any other drawing on vellum; nor is there any document naming the sitter. The only scrap of supporting evidence Kemp could find for the choice of medium was a note Leonardo had once written asking a French court painter about this technique:

Get from Jean de Paris the method of dry colouring and the method of white salt, and how to make coated sheets; single and many doubles; and his box of colours.

Kemp observed that there were tiny holes in the side of the drawing which showed that it had once been bound into the Warsaw book. But the holes were in the wrong places, there werenвЂ™t enough of them, and the type of vellum was not the same as that in the book. In addition to that, the Bella Principessa was wearing a costume that was too dowdy for a wedding, and a strange slit in her sleeve was inexplicable.* To add to the case against, the drawingвЂ™s owner claimed to the Sunday Times that he had found the picture in a drawer at a friendвЂ™s house in Switzerland.9 (#litres_trial_promo) The Italian art historian Mina Gregori agreed with Kemp about the attribution, but most other Renaissance art historians reacted with doubt, or worse, derision. Kemp and the paintingвЂ™s private owner, Peter Silverman, wanted it to be exhibited in a major public institution, and allowed the Kunsthistorisches Museum in Vienna to examine the painting in its labs, with a view to showing it, but the museum director reported back that he didnвЂ™t think the work was genuine.

Despite his isolation, Kemp stuck to his guns, and became, like many connoisseurs in such a position, increasingly vociferous in his opinion and increasingly defensive towards his critics. Such is the way of these things that Kemp ended up working with a collaborator who soon became controversial. He invited a Canadian forensic art expert called Peter Paul Biro to look at the picture. Biro had made a name for himself authenticating works of art by discovering the hidden fingerprints of artists on them, deploying a multi-spectral-imaging camera with impressive powers of magnification which he had designed himself. He claimed to have authenticated pictures by Turner, Picasso and Jackson Pollock with his fingerprint cameras. Kemp invited Biro to examine the Bella Principessa and Biro found a fingerprint on the picture which, he said, was вЂ?highly comparableвЂ™ to another on LeonardoвЂ™s St Jerome. But in 2010 an article in the New Yorker by David Grann alleged that Biro had found PollockвЂ™s fingerprints on paintings supposedly by Pollock but which, experts said, contained acrylic paint that had not been previously documented in his drip paintings.10 (#litres_trial_promo)

Kemp blamed the failure of La Bella Principessa on its over-hasty exposure to the media by Silverman. вЂ?I call it premature ejaculation,вЂ™ he told The Art Newspaper. вЂ?There were things that came out before they were thought through. I would have much preferred to produce all the evidence when we had it, in one go.вЂ™11 (#litres_trial_promo) Kemp said he had learned from the Bella Principessa debacle: вЂ?Above all, the public debut of a major item should be accompanied or preceded by the full historical and technical evidence being made available in the way scholars regard as proper.вЂ™12 (#litres_trial_promo)

And yet, when Robert Simon invited Martin Kemp to see the Salvator Mundi, the Oxford art historian seemingly forgot all his own advice.

* (#ulink_416a1378-8a3f-5915-8296-d75845a72d17) The Polish art historian Katarzyna KrzyЕ»agГіrska-Pisarek wrote an analysis of the drawing: вЂ?There is no real evidence that La Bella Principessa shows Bianca Giovanna Sforza, or that the vellum leaf comes from the Warsaw Sforziad вЂ¦ The vellum of the Warsaw Sforziad is of different quality/texture (white and smooth) than the support of La Bella Principessa (yellow and rough, with follicles) and its size is different too (by 0.8 cm). The drawing was also made on the inferior, hairside of the vellum, unlike BiragoвЂ™s illuminations [contained in the Warsaw volume] вЂ¦ the вЂњarchaicвЂќ, formal and highly finished style of La Bella Principessa combined with the complex mixed media technique are unusual for Leonardo, and there is no evidence that he ever drew a full female profile (face and body), especially in coloured chalks on vellum вЂ¦вЂ™

CHAPTER 6

The Blue Clue (#litres_trial_promo)

Mystery is the defining quality of LeonardoвЂ™s art. A seductive glance is thrown, we know not to whom. The Virgin and child take shelter with saints and angels in a twilight grotto, which has no address in the Bible. A smile, whose cause can only be imagined, begins to cross a womanвЂ™s face, if indeed it is a womanвЂ™s face, if indeed it is a smile. Around these strange incidents and encounters hover a few ambiguous facts open to a multitude of interpretations. Our understanding of LeonardoвЂ™s life and work rarely becomes more than a pool of theories, surrounded by a tangle of conjecture, suspended from a geometry of clues. Amidst this network of possibilities, the Salvator presents the most fundamental mystery of them all. In some respects, it appears to be the most compressed embodiment of the essence of LeonardoвЂ™s art; in other ways it is a stark anomaly. While other of LeonardoвЂ™s paintings ask questions like, Am I smiling? or What am I feeling? or even Who is winning?, the Salvator asks Am I a Leonardo?

LeonardoвЂ™s paintings have left a trail of documents behind them вЂ“ contracts for commissions, legal filings from irate clients, eyewitness statements from admirers, oral histories recorded by the children of men who knew him, and even notes in the margins of books on completely different subjects. Such documents are a mine of information.

There are legal agreements for many of LeonardoвЂ™s commissions, each of which contains its own set of illuminating details about LeonardoвЂ™s profession and character. The one for his first major work, the Adoration of the Magi, offered him a piece of land as payment, which he couldnвЂ™t sell for three years, while he had to pay for all the paints and gold leaf himself. He was soon behind schedule, and the monks wrote to him telling him to hurry up. Within a year they had given up, writing off the small sum they had already advanced Leonardo so he could buy wheat and wine. Leonardo was a genius, but also temperamental and, by turns, a self-critical perfectionist: he worked slowly and left many works unfinished, much to the exasperation of his clients. A trail of lawsuits followed him wherever he went.

In 1500 another set of angry monks, this time Milanese, from the Confraternity of Immaculate Conception, refused to pay for the Virgin of the Rocks, now in the National Gallery in London, saying it hadnвЂ™t been finished. Leonardo countersued, arguing that the previously agreed fee was too low for the quality of work he was providing. The dispute lasted years. In 1506 a judge ruled in favour of the monks, arguing that there was not enough of LeonardoвЂ™s hand in the picture, and that he had to return to Florence and finish it. He went back reluctantly, but it is not known what additional work he carried out on the painting.

Another important client, the Council of Florence, was disappointed the same year, when the artist left for Milan leaving behind him the unfinished Battle of Anghiari, now lost. Leonardo had вЂ?taken a goodly sum of money and provided a small beginning of a great work, which he should have madeвЂ™, complained the Gonfaloniere, one of the cityвЂ™s leaders.

Where there are no surviving contracts, we often read of LeonardoвЂ™s paintings in the letters and memoirs of awestruck fans, who recorded for posterity the moment they met the great artist. Secretaries and agents of cardinals and countesses left entries in their diaries marvelling at the paintings and notebooks they had seen when they visited his studio, such as Antonio de Beatis who saw the St John, the Mona Lisa and the Virgin and Child with St Anne in LeonardoвЂ™s studio in 1517. LeonardoвЂ™s unusual working practices were often a talking point. The Italian author Matteo Bandello recorded watching him working on The Last Supper in 1497:

He would arrive early, climb up on to the scaffolding, and set to work. Sometimes he stayed there from dawn to sunset, never once laying down his brush, forgetting to eat and drink, painting without pause. At other times he would go for two, three or four days without touching his brush, but spending several hours a day in front of the work, his arms folded, examining and criticising the figures to himself. I also saw him, driven by some sudden urge, at midday, when the sun was at its height, leaving the Corte Vecchia, where he was working on his marvellous clay horse, to come straight to Santa Maria delle Grazie, without seeking shade, and clamber up on to the scaffolding, pick up a brush, put in one or two strokes, and then go away again.

Proof of LeonardoвЂ™s authorship of paintings can come from the most obscure and unpredictable sources. The identity of the Mona Lisa and the date when Leonardo started painting it were both subject to dispute until 2005, when a German scholar came across a note in the margin of a Renaissance volume of letters by the Roman orator Cicero. The marginalia came from Agostino Vespucci, a Florentine civil servant who worked for Machiavelli. A line from Cicero, about how the fabled Roman painter Apelles left parts of his paintings unfinished, reminded Vespucci of Leonardo. Cicero commented, вЂ?Apelles perfected the head and bust of his Venus with the most elaborate art, but left the rest of her body roughly rendered вЂ¦вЂ™ Vespucci jotted next to the text:

вЂ¦ This is how Leonardo da Vinci does all his paintings, for example the head of Lisa del Giocondo and of Anne, the mother of the Virgin. We will see what he is going to do in the hall of the Great Council, for which he has just reached an agreement with the Gonfaloniere. October 1503

From such a recent, chance discovery, art historians could confirm that Leonardo was painting a version of the Mona Lisa by 1503, earlier than many had previously thought, and that her identity was definitely the Florentine noblewoman Lisa del Giocondo.

LeonardoвЂ™s works were the subject of public spectacle as well as private reflection. By 1500 he was a celebrity, whose every move was watched and gossiped about. It was a major event when a new Leonardo was finished and unveiled to the general public, akin to the opening weekend of a blockbuster film today. Vasari wrote that when a new cartoon of St Anne was put on display in Florence for two days in 1501 (incidentally the first show of a single drawing in the history of Western art), вЂ?it attracted to the room where it was exhibited a crowd of men and women, young and old, who flocked there as if they were attending a great festival, to gaze in amazement at the marvels he had createdвЂ™.

There are only two Leonardos that were undocumented in his lifetime: the Portrait of a Musician in the Ambrosiana in Milan, which art historians tend to think is by LeonardoвЂ™s assistant Giovanni Antonio Boltraffio, and the St Jerome, whose authenticity has never been questioned and for which certain probable references can be found. Both of these paintings were made relatively early in LeonardoвЂ™s career. There is no Leonardo painting executed after 1496 which is not remarked in contemporary sources вЂ“ except, perhaps, one now.

No records from the artistвЂ™s lifetime, or for a further hundred years after it, mention Leonardo painting a Salvator Mundi. This is all the more surprising because of the significance of the subject matter. The Christ which Leonardo painted in his Last Supper is the subject of a long anecdote in VasariвЂ™s Lives of the Artists. He relates how Leonardo went to see his client, the Duke of Milan, and provided a progress report on The Last Supper, explaining that he had still not yet painted ChristвЂ™s head because вЂ?he was unwilling to seek a model on earth and unable to presume that his imagination could conceive of the beauty and celestial grace required of divinity incarnateвЂ™.

If the greatest artist of his times was painting the greatest subject in Christian art, a Salvator Mundi, one would expect to find it recorded in a note in a monkвЂ™s chronicle or a secretaryвЂ™s letters, at the very least. The absence of such documentation is the first great mystery of the Salvator Mundi. It compels art historians to rely on their вЂ?superpowerвЂ™, вЂ?the eyeвЂ™, alone. The name of the artist and the date of execution of this painting can only be determined by analysis of the style, technique and motifs of the work, but the result of such a process will always lack the certainty of proof.

Leonardo never dated any of his paintings, but on stylistic and technical grounds, the Salvator Mundi can be placed in the second half of his career, beginning after 1500 and ending with his death in 1519. The preparatory drawings must have been made in the early years of the sixteenth century because they are executed in LeonardoвЂ™s softer red chalk style. They are usually dated 1502вЂ“10. The painting itself has the intense sfumato shading of the second phase of LeonardoвЂ™s work, beginning in the sixteenth century. The walnut wood used for the panel points to a date after 1506, when Leonardo returned to Milan. Walnut was a relatively unusual choice in Renaissance Florence, but was widely used by Milanese painters. It is difficult to be more precise, because Leonardo worked on many of his pictures for a long time, painting them slowly, sometimes on and off over a decade or more, occasionally returning to them after an intermission, often never finishing them. The scientific means of dating a panel painting by analysing the rings in the wood, dendrochronology, cannot be used with walnut, because the rings are too widely spaced to give more than the vaguest indication of epoch.

Whatever the day was when the first brushstrokes were applied to the Salvator Mundi, Leonardo had by then become one of the most celebrated living artists of the Italian Renaissance, alongside Botticelli, Piero della Francesca, Raphael, Michelangelo, Giovanni Bellini, Andrea Mantegna and a dozen others. He had progressed from artistic child prodigy to gifted studio assistant, then a master painter with his own practice in Florence, and later official court artist, the grandest position a Renaissance artist could rise to in Milan, where he also worked as a sculptor, engineer, set designer and architect. But his career had also had challenging periods when work and money were in short supply.

Born in 1452 in Vinci, a village on the outskirts of Florence, Leonardo was the illegitimate son of a notary, Ser Piero, and a local farmerвЂ™s daughter, Caterina di Meo Lippi. His early life was both privileged and disadvantaged. Ser Piero was well-to-do, with a number of properties including a farm in Vinci. By the time Leonardo was in his late teens his father also had offices in the Bargello in Florence, where he offered his legal services to clients from important monasteries and Florentine businesses. But having been born out of wedlock, Leonardo seems not to have received the classical education that a family of PieroвЂ™s standing would normally have given their son. He grew up not having learned Latin or Greek, and occasionally referred to that lack in his notebooks. He called himself an вЂ?unlettered manвЂ™, and once signed himself вЂ?Leonardo da Vinci, disciple of sperentiaвЂ™, which means both experience and experiment, Renaissance Italian for the вЂ?school of lifeвЂ™. For the introduction of his planned treatise on painting, which he never published himself, he drafted this opening paragraph:

I am fully aware that my not being a man of letters may cause certain presumptuous people to think that they may with reason blame me, alleging that I am a man without learning. Foolish folk! вЂ¦ They strut about puffed up and pompous, decked out and adorned not with their own labours, but by those of others вЂ¦ They will say that because I have no book learning I cannot properly express what I desire to describe вЂ“ but they do not know that my subjects require experience rather than the word of others.

Leonardo had the Renaissance version of a chip on his shoulder. He turned this weakness into a strength by approaching his subjects without preconceptions or precepts, making the blank page the starting point for enquiry and creativity.

Fifty kilometres east of Vinci lay the ochre and red assemblage of roofs, domes, towers and crenellations of Florence, where the Renaissance was under construction. The dome of Florence cathedral, designed by Brunelleschi, built without scaffolding out of four million bricks, still the largest masonry dome in the world, was nearing completion; Leonardo was to be involved in its finishing touch, a gleaming bronze ball placed atop the lantern in 1472. Luca della Robbia was filling lunettes and decorating sarcophagi with his ceramic reliefs of pretty Madonnas and characterful saints, smoothly glazed in bright green, blue, white and yellow. In the evenings the low sunlight caught GhibertiвЂ™s Gates of Paradise, a door with ten scenes from the Old Testament, cast in bronze but looking like burnished gold, completed in 1424 and given its popular name by an admiring Michelangelo. It was a beacon to the future of art, with its energetic crowd scenes full of billowing robes and flailing limbs, set within the arches and atria of monumental classical backdrops.

The basic laws of perspective, the representation of three-dimensional space on two dimensions, mostly forgotten since Antiquity, had been revived in frescos decorating chapels by artists Masolino and Masaccio, and in diagrams and text by the architect and humanist Leon Battista Alberti. All these developments were so remarkable that, a century later, they prompted the first ever art history book, VasariвЂ™s Lives of the most Excellent Painters, Sculptors and Architects, to give it its full title. This account of Italian art from the fourteenth to the sixteenth century distinguished between three phases in Renaissance art вЂ“ early, middle and high вЂ“ categories which are still widely accepted today. Vasari placed Leonardo at the start of вЂ?the third manner which we will agree to call the modernвЂ™.* Today this period is known as the High Renaissance.

LeonardoвЂ™s father was a friend of one of the busiest artists in Florence, Andrea Verrocchio. He ran a large workshop in premises previously occupied by the greatest Florentine Renaissance sculptor from the preceding generation, Donatello, showing how the baton of the Renaissance was handed down from one leading artist to the next. A team of assistants helped Verrocchio execute a mixture of large-scale commissions, statues, jewellery and small workshop paintings, which could be bought by customers coming in off the street. Leonardo had shown early ability with drawing, and his father took him into Florence to see Verrocchio. He was taken on as an apprentice in his mid-teens, around 1469.

Already by his early twenties, LeonardoвЂ™s style was so distinctive that art historians argue over which parts of VerrocchioвЂ™s paintings might be by the master and which by his precocious pupil. There is a deliciously shiny fish and an alert, fluffy dog in VerrocchioвЂ™s Tobias and the Angel (1470вЂ“75) which are sometimes attributed to Leonardo. The angel on the far left of VerrocchioвЂ™s Baptism of Christ, with his demure and elliptical expression, that tiny knowing smile and hint of gender fluidity, is said to be by Leonardo. In the background, a vast panorama of rolling hills, lakes and steep mountains unfolds, strikingly different from VerrocchioвЂ™s well-tended lawns, gentle slopes and neatly pruned trees. Another tell-tale sign is that this background is painted in oil. Leonardo liked to use the new medium of oil paint, which had arrived recently from the Netherlands, while Verrocchio used the old medium of tempera, based on egg yolk, so parts of his paintings finely executed in oils are generally thought to be by Leonardo.

In 1478 Leonardo left VerrocchioвЂ™s workshop and set up his own practice in Florence. His first major commission, from an order of Augustinian monks, the Adoration of the Magi, now hangs in the Uffizi. It was a breathtakingly inventive work for its time in how it set aside the conventional, flat depiction of this scene and instead offered a sweeping arabesque of a procession, which curves from the distance to the foreground, suggesting the passage of time and a distance travelled. The wise kings and their entourage gather in a semi-circle around the Madonna and child, evoking a deep foreground space. The recently restored Adoration shows the artistвЂ™s underdrawing, a dense web of constantly altered figures, gestures and details, which point to yet another distinctive characteristic of Leonardo: a striving imagination which altered his compositions with a freedom unknown to his contemporaries. The painting was never finished.

In Florence, Leonardo painted a dynamic and beautifully proportioned Annunciation, in which one finds his obsession with naturalistic detail in the flowery lawn and marble table. Close-up photographic study of the painting has also revealed the artistвЂ™s fingerprints, another distinguishing feature of his work. Leonardo had, it seems, an idiosyncratic way of occasionally using his fingers and palms to work the paint. At this time he also painted his first known portrait, of Ginevra deвЂ™ Benci. The paintingвЂ™s realism, its glossy oil-painted sheen and austere atmosphere of introspection, show the huge impact on Leonardo of northern European Renaissance painters, whose fame had spread to Italy. In the St Jerome, which never went beyond the design stage, Leonardo conveys the suffering of the saint in the wilderness by his meticulous depiction of an undernourished anatomy. LeonardoвЂ™s drawings were as epoch-making as his paintings. On 5 August 1473 he drew in pen and ink what Martin Kemp has described as вЂ?simply the first dated landscape study in the history of Western artвЂ™1 (#litres_trial_promo) вЂ“ a view of the Arno valley showing Montelupo Castle, just outside Florence.

Around 1482, Leonardo left Florence to begin the second phase of his professional life in Milan, not for the last time reneging on his contractual obligations to finish paintings when he saw the opportunity for a step up the professional ladder. The new Milanese ruler, Duke Ludovico Sforza, had consolidated his power after defeating the French army and poisoning his nephew. Now, like many a newly established despot before and since, he turned to culture as a tool of statecraft (today this is called вЂ?art washingвЂ™). Sforza wished to make Milan a northern city to rival Florence, but Leonardo appears not to have been aware of the dukeвЂ™s new priorities. There is a draft of a letter to him in the notebooks in which Leonardo вЂ“ a man on the make as well as a genius вЂ“ seeks to reinvent himself as an engineer. He pitches hard that he could make вЂ?all kinds of mortars, most convenient and easy to carry, and with these I can fling small stones almost resembling a stormвЂ™. He could dig tunnels under rivers, make вЂ?safe and invincibleвЂ™ chariots, вЂ?big gunsвЂ™ and catapults, and lastly вЂ“ change of subject вЂ“ вЂ?I can carry out sculpture in marble, bronze, or clay, and also I can do in painting whatever may be done.вЂ™ It was these last two talents that the duke would principally avail himself of.

At the time, Milan was a cultural backwater. The most popular local painters, Vincenzo Foppa, Bernardo Zenale and Ambrogio Bergognone, had barely left the Middle Ages, stylistically speaking. Their workshops were busy but the output uninventive. Thick halos of gold leaf encircled the heads of their saints, who stood stiffly in their heavy robes. Their complexions were pallid and their facial expressions dour and portentous. A wonky perspective in the depiction of a throne, canopy or manger in the foreground usually jarred with that of the architecture or landscape behind. By comparison, Leonardo was the avant-garde with his anatomical and botanical precision, his developing subtle tonality (aka sfumato) and his grip on storytelling.

LeonardoвЂ™s first commission in Milan was the most enigmatic painting of his entire oeuvre, the Virgin of the Rocks which now hangs in the Louvre (the National Gallery in London has a second, later version of the painting). Once again the traditional format for such paintings, in which the Virgin and child are seated on a throne on a podium, with saints on either side, has been unceremoniously discarded. Instead, the mother and child appear to have taken refuge in a mountain cave, along with a baby St John, who prays to Jesus, though the Bible never suggests that they met at this age. The group are perched on the edge of a rocky chasm which falls away in front of us, creating a gulf between the viewer and subject. The bizarre landscape of rocky pillars recalls the Surrealist paintings of Max Ernst four and a half centuries later. The painting is the epitome of the sophisticated but indecipherable symbology which Leonardo inserted into his compositions. The lake in the background on the left may symbolise the purity of the Virgin, and so may the foreground, since Mary is referred to in the Song of Songs as вЂ?the cave in the mountainвЂ™. Alternatively, the inhospitable terrain could refer to medieval biographies of St John the Baptist or St Francis, while the manner in which the entire rocky backdrop echoes the arrangement of holy figures could embody the belief, widespread in the Middle Ages and shared by Leonardo, that the earth with its land and water functioned much like the human body with its flesh and blood. Art historians have discussed the meaning of this painting for centuries, without reaching any degree of certainty or agreement.

In Milan, Leonardo introduced emotional transitions, suggested movement and implicit narratives into the static genre of portrait painting. The faces of his sitters show shifting and elusive emotions вЂ“ moti mentali, as he described them вЂ“ of acquiescence and resistance, of pleasure and fear. There is a strange atmosphere of serenity and intimacy in these portraits, whose subjects have the faintest of smiles, anticipating the Mona Lisa. The Lady with an Ermine is the most dramatic of them all. A young woman, not yet twenty, turns her head as if taken by surprise вЂ“ perhaps even feigning surprise вЂ“ as she hears someone approaching her from behind. She looks shy but inquisitive, demure but also coquettish. The painting was commissioned by the sitterвЂ™s lover, the Duke of Milan, Ludovico Sforza. The opposing directions of movement of her head and body belong to the already established Renaissance language of contrapposto, counterpoise, a way of articulating the body to create drama and volume, to which Leonardo has added a narrative purpose.

When Leonardo turned to The Last Supper, a commission for the dining hall of a Milanese convent, he was dealing with an established biblical narrative, in which gestures and facial expressions had long conveyed story and drama. However, he ratcheted up the excitement and action to new levels. He depicted the moment of greatest antagonism, when Christ tells his disciples, вЂ?One of you will betray me.вЂ™ Their reactions create an undulating wave of emotions on either side of Christ вЂ“ postures and faces showing surprise, shock, denial (from Judas, clutching a bag of money), shame, anxiety, argument, and even fainting. вЂ?The painter who wants to have honour in his work,вЂ™ wrote Leonardo, вЂ?must always find the imprint of his work in the natural, spontaneous acts of men, born from the strong and sudden revelation of feelings, and from those make brief sketches in his notebook, and then use them for his purpose.вЂ™

In the 1490s Leonardo began to write and draw entries in his notebooks, of which only a quarter are estimated to have survived. These codices and manuscripts constitute one of the most important historical archives of all time, a cross-section of the European intellect and imagination at the doorstep of a new world of discovery and experiment, and proof that Leonardo possessed one of the most active and analytical minds of all time, вЂ?undoubtedly the most curious man who ever livedвЂ™, as Kenneth Clark called him.

Across the notebooksвЂ™ pages a dazzling array of thoughts unfold about the natural world and the sciences. The art historian Ernst Gombrich remarked how вЂ?Posterity had to struggle with that awe-inspiring legacy of notes, jottings, drafts, excerpts, and memoranda in which personal trivia alternate with observations on optics, geology, anatomy, the behaviour of wind and water, the mechanics of pulleys and the geometry of intersecting circles, the growth of plants or the statics of buildings, all jostling each other on sheets that may contain sublime drawings, absent-minded doodles, coarse fables, and subtle prose poems.вЂ™2 (#litres_trial_promo) To be sure, Leonardo was as idiosyncratic as he was intelligent: all the text was written in right-to-left mirrored handwriting, which suggests to our imagination a desire to withhold secrets from all but the most dedicated students, but which may also be a sign of LeonardoвЂ™s вЂ?unletteredвЂ™ if not obdurate pragmatism. It was easier for the left-handed artist to write backwards because there was less risk of smudging the ink.

Leonardo appears to have been a highly unconventional character. He had a distinctive taste in clothes вЂ“ his early biographer Anonimo Gaddiano wrote that he вЂ?wore a rose-coloured cloak, which came only to his knees, although at the time long vestments were the customвЂ™. A list of his clothing in his notebooks itemises a pink cap, two rose-coloured gowns, a purple-velvet hooded cape, and two satin coats, one crimson and one purple again.3 (#litres_trial_promo) One supposed portrait of him, which may hint at his character, is by his friend Bramante, who, the artist Gian Paolo Lomazzo wrote, used LeonardoвЂ™s face for a fresco of the melancholic Greek philosopher Heraclitus. We see a straggly-haired forty-something man, his face running with tears, perhaps from sadness, but also possibly from drunken mirth. Leonardo appears to have been, or to have become, a vegetarian. The Florentine traveller Andrea Corsali wrote a letter to a friend in 1516 in which he mentioned that Leonardo вЂ?lives on rice, milk and other inanimate foodsвЂ™. That was a highly unusual diet for a Renaissance European.

Leonardo seems to have had a high sense of self-worth. His pictures did not come cheap by the standards of the day вЂ“ The Last Supper cost 200 ducats. He could be short-tempered if he felt he was not being accorded the respect he was due: on one occasion he told a clientвЂ™s cashier haughtily, вЂ?I am not a penny painter.вЂ™ But at the same time he apparently often felt dissatisfied with his achievements, and some early biographers cite that as the reason he left so many of his paintings unfinished. Lomazzo, who spoke to LeonardoвЂ™s assistant Francesco Melzi, wrote that вЂ?He never finished any of the works he commenced because, so sublime was his idea of art, he saw faults even in the things that to others seemed miracles.вЂ™

In this first Milanese period, Leonardo was commissioned to make a monument to the Duke of MilanвЂ™s father. He designed the largest equestrian statue in the world, and built a clay model three times life-size. But before he could cast it in bronze, the French crown had turned against the Milanese duke. The duke reassigned the metal that had been intended for the statue to the production of cannons, but with little effect. The French King Louis XII invaded northern Italy and occupied Milan. The world lost a masterpiece and Sforza his dukedom. There is a touching description in the notebooks of how Leonardo hid his money in small bags around his studio as the foreign army approached. When they arrived, French archers used LeonardoвЂ™s giant clay prototype for target practice and destroyed it.

Leonardo had now lost his great benefactor, and there followed several years of uncertainty, if not poverty. He travelled to Mantua and Venice, reduced on one occasion to making drawings of crystal and amethyst vases for Isabella dвЂ™Este, who was considering buying them, and on another to sketching the villa of a Florentine merchant for the Duke of Mantua, who wanted to build his own country mansion.

Leonardo moved on to Florence in 1500, and spent the next six years there. He was given a studio in the large halls of the Santa Maria Novella church. A measure of stability returned, notwithstanding a curious brief interlude in 1502вЂ“03 when the notorious warlord Cesare Borgia employed him for two years as his military architect and engineer, although, beyond drawing a map, it is not clear what work the artist actually carried out for the commander.

In Florence Leonardo began his second great phase of works, distinguished by their intense sfumato effects, which included the Mona Lisa and Virgin and Child with St Anne. His storytelling reached its apogee in The Battle of Anghiari, a prestigious commission for the Signoria, the seat of the Florence town council. He had technical problems with this fresco, as would later emerge with The Last Supper. Before he had finished it, his paint started slipping and flaking off the walls of the council chamber. He blamed a freak rainstorm, but the cause was more likely his technique of trying to use oil paint on plaster, to which it could not adhere. Leonardo could be slow at some times, but rushed and careless at others. He could have avoided the decay of his largest works, The Last Supper and The Battle of Anghiari, if he had first tested his technique out on a smaller scale. The original Battle no longer survives, but there is what is thought to be an accurate copy in the form of a large drawing, which probably began life as a copy of LeonardoвЂ™s cartoon, which was then reworked or retouched by the great seventeenth-century Dutch painter Rubens вЂ“ an example of how complicated and how hybrid the authorship of Old Master drawings and paintings can be. The scimitars of mounted soldiers clash, while the heads of their horses butt against each other in a tight, violent circle of a composition which shows that Leonardo, for all his apparent disdain for learning, must have studied Graeco-Roman battle friezes and free-standing sculptures.

In 1506 Leonardo returned to Milan, lured there by its new French rulers, leaving the Battle unfinished, much to the fury of the Florentine town council. In Milan he continued to work on paintings designed or begun in Florence, the Virgin and Child with St Anne and the Madonna of the Yarnwinder among them, although the latter may have been partly executed by assistants. Here he and his assistants probably also finished painting the second version of the Virgin of the Rocks.

The Salvator Mundi was probably begun in this period, possibly for a client from the French court. The painting compresses into its modest format a summation of many, but not all, of the techniques, themes and passions of LeonardoвЂ™s oeuvre. His Christ is not like the bright and youthful Jesuses of Raphael, or the strong athletic ones of Michelangelo. He seems a level above such mortal and physical attributes. He floats towards the onlooker like a mystical vision. He transcends time, harking back to the images of a blessing Christ that are found in early Christian catacombs and on the mosaic ceilings of Byzantine churches, but upgraded with a Renaissance makeover that is both realist and idealising. The SalvatorвЂ™s eyes, eroded as they undoubtedly are, seem to look straight through us, with a gaze as piercing as it is ethereal. ChristвЂ™s expression hovers, in that Leonardesque way, between a range of contrasting emotions: serene, placid, wise, resigned, resolute, or implacable and unmoved. On the almost imperceptibly upturned corners of ChristвЂ™s lips, damaged as they are, is the slightest trace of a smile. The facial typology of the Son of God seems eerily modern, like those of the Nazarenes or Romantic painters, evidence of the realism and originality of LeonardoвЂ™s portraiture.

Leonardo is known for the intricate and precise way he painted hair, so different from the patterned and schematic rendering of his Renaissance contemporaries. In the Salvator, ChristвЂ™s long curls glisten with highlights of varying intensity as they catch the light. Amidst the best-preserved strands on the right you will find a double helix, a shape that we find in LeonardoвЂ™s drawings of coiled ropes, machines and waterfalls. In his notebooks he wrote of the similarities between the way hair fell and water flowed. There were вЂ?two motions, of which one responds to the weight of the strands of hair and the other to the direction of the curls; thus the water makes turning eddies, which in part respond to the impetus of the principal current, while the other responds to the incidental motion of deflectionвЂ™.

These curls may also be carnal. LeonardoвЂ™s notebooks contain sketches of curly-haired boys, which are often said to be portraits of his teenage assistant and almost certainly his lover, Gian Giacomo Caprotti da Oreno, whom Leonardo nicknamed Salai, or вЂ?mischievous oneвЂ™. In April 1476, a week before his twenty-fourth birthday, Leonardo was arrested by the zealous Florentine vice squad, which patrolled the city streets at night. The accusation was of sodomy with a male prostitute, though the artist was acquitted.

Along the edges of ChristвЂ™s garment runs filigree embroidery in golden thread, forming a geometric pattern of knots, sparkling like his hair with reflected light. Leonardo was fascinated by knots, in which his passions for mathematics, geometry and art intersected. He copied and owned the knot patterns of artists, and he also invented his own, far more intricate, ones. Prints of his вЂ?Vincian knotsвЂ™ were sold across Europe. Vasari remarked how Leonardo would вЂ?waste his time in drawing knots of cords, made according to an order, that from one end all the rest might follow till the other, so as to fill a roundвЂ™. In fact, mathematicians from the University of California analysed LeonardoвЂ™s knots a few years ago and found that they were made up of several broken strands, not a single one. Where necessary illusion trumped science in LeonardoвЂ™s art.4 (#litres_trial_promo)

The hands and the orb provide further evidence of LeonardoвЂ™s keen observation, obsession with detail and willingness to replace the tiringly conventional with the marvellously real. The orb held by the Salvator Mundi was commonly depicted in European Renaissance paintings as brass or bronze, sometimes with a cross above it. Sometimes it was painted as a globe of the earth. In some northern European paintings it is transparent, and within it you may see an unforgiving biblical landscape. Leonardo, however, has painted his as a large, solid rock crystal.вЂ Despite the severe damage this part of the Salvator Mundi has suffered, you can see tiny defects in the orb, known as вЂ?inclusionsвЂ™, and air bubbles, each exactingly painted with a dark ring of shadow and a dab of white highlight. Leonardo has added more careful highlights around the fingertips, as if lit by вЂ?lustreвЂ™, as he called bounced light, here reflected off the crystal orb.

Meanwhile, the SalvatorвЂ™s other hand, raised in blessing, displays a balletic grace and solid volume. It is painted with a faultless foreshortening (a kind of perspective for objects and bodies, when seen front-on) so that it seems to project itself out of the picture towards us. Leonardo has added soft trails of lead white paint along the edges of the fingers, in the creases of the palm, and a dab at the bottom of the thumb, suggesting the softest of broken light from the upper left. Equally, veils of shadow of subtly varying darkness are painted on the parts of the hand facing away from the light, like the third knuckles of the bent fingers. The thumb curves inwards вЂ“ previously rare in paintings of this type вЂ“ so that the entire gesture forms an elegantly elongated pyramid, a geometric form Leonardo often used for his compositions of figures.

All these elements cohere in the sfumato style in which the painting is executed. While LeonardoвЂ™s peers favoured bright colours and strong lines, Leonardo, a maverick within the Renaissance avant-garde, took painting in the opposite direction towards tonality, building up from dark undercoats to light highlights. Raphael, Michelangelo, Perugino, Piero della Francesca and other Renaissance masters painted scenes that were flooded with light. Their saints, temples and porticos have bright hues. They painted lighter colours on first, in general, and then modelled the figures and architecture with darker shades. But Leonardo worked the other way round. The Salvator is painted up from gloomy underlayers of dark vermilion and black paint. Areas of light are built up from this darkness in thin, transparent layers of very carefully graduated oil-based mixtures, known as glazes. Leonardo advised: вЂ?Paint so that a smoky finish can be seen, rather than contours and profiles that are distinct and crude.вЂ™

However, the sfumato which we admire in LeonardoвЂ™s paintings today is never only the work of the Renaissance master. Part of the effect derives from the decay of the art. LeonardoвЂ™s fresco paintings, The Last Supper and The Battle of Anghiari, fell apart in his own lifetime because he tried to find a way to paint with oils on plaster; the paint did not stick. In other paintings, most famously the Mona Lisa, the colours have faded and the varnishes darkened. Restorers dare not clean the painting, lest the general public not recognise the work of art which emerges from underneath. The St Jerome once had the saintвЂ™s head cut out, and it was only glued back in decades later. Of all LeonardoвЂ™s paintings, the Salvator is, relative to its size and regarding the most important areas of the work, the most damaged of them all. LeonardoвЂ™s paintings often carry the enhanced atmosphere of an ancient ruin, a work of genius placed slightly beyond reach by the ravages of time. The texture itself prompts a spiritual reflection on the transitory nature of material things, combined with an irresolvable yearning for something lost forever.

While we see so many of the above Leonardesque attributes in the Salvator, other notable aspects of the painting are not very Leonardo. The composition, for one thing, is uniquely flat within the artistвЂ™s oeuvre. Christ has none of the movement and contrapposto we see in the figures in LeonardoвЂ™s other paintings, despite the fact that he had written вЂ?Always set your figures so that the side to which the head turns is not the side to which the breast faces.вЂ™ Rather than reinvent the composition of this traditional subject, Leonardo seems to have produced, for the first and only time in his life, a carbon copy of the static one that scores of other early Renaissance artists used. The typology of the Salvator Christ, with its long nose and sombre expression, is remote from the delicate, androgynous charm of the Christ he painted in The Last Supper and of a drawing of Christ he made around 1494. In fact, the facial features donвЂ™t resemble any of LeonardoвЂ™s drawings of other young men. The orb presents another problem. Its realism is undermined by the absence of any notable optical distortions in the drapery behind it, and of the reflections of the surroundings which would logically be visible in such a piece of crystal. Leonardo studied and wrote about optics at length in his notebooks; it is unlikely that he would paint such an object in such an unrealistic way.

After Martin Kemp accepted Robert SimonвЂ™s invitation to examine and research the Salvator Mundi, the Oxford art historian embarked on years of study of the painting in all its aspects, from its style to its iconography, and from its overall effect to its smallest details. The painting merits attribution to Leonardo, Kemp has elegantly written, because of

вЂ¦ the soft skin over the bony joints of the fingers of ChristвЂ™s right hand, implying but not describing anatomical structure; the illuminated tips of the fingers of his left hand, the glistening filaments of vortex hair, above all on the right as we look at the picture; the teasing ambiguity of his facial features, the gaze assertively direct but removed from explicitness; the intricately secure geometry of the angular interlace in the neckline and cross-bands of his costume; the gleaming crystal ellipse on the pendant plaque below his neckline; the fine rivulets of gathered cloth on his chest.5 (#litres_trial_promo)

The painting has, in short, вЂ?LeonardoвЂ™s magicвЂ™. Kemp finds great significance in the contrasting ways in which the face and hand were painted, the former softly, the latter crisply. Leonardo was the first artist to write about aerial perspective вЂ“ the way colours and outlines fade the further away they are.вЂЎ Kemp notes that the way the blessing hand comes forward in sharp focus towards the onlooker, while the face hovers in a mist of sfumato, is an application by the artist of his observations on the вЂ?perspective of disappearanceвЂ™.

Kemp views the painting as LeonardoвЂ™s spiritual manifesto. The sign of this is the replacement of the conventional brass orb plus cross (the globus cruciger), with a transparent globe. Through this adaptation Leonardo was representing the cosmology of the Graeco-Roman mathematician and astronomer Ptolemy, who believed that the earth was surrounded by a transparent вЂ?crystalline sphere of the heavensвЂ™, in which the stars were situated. вЂ?So what youвЂ™ve got in the Salvator Mundi is really a Saviour of the cosmos, and this is a very Leonardesque transformation,вЂ™ Kemp has said.6 (#litres_trial_promo)

In regard to some of the un-Leonardo-like aspects of the picture, Kemp has developed explanations. The flat composition can be understood as the influence of the Veil of Veronica, an image of ChristвЂ™s face, not dissimilar to the Turin Shroud, left when the eponymous saint wiped JesusвЂ™s face with a piece of cloth. The subjects of the Salvator Mundi or Christ Pantocrator, which were very popular in Renaissance Europe, always showed Christ flat-on, looking straight towards the viewer. It was a serious subject, Christ as God, which demanded an austere and sombre treatment. If LeonardoвЂ™s painting had been made for a client, a conservative format might well have been insisted on. The explanation for the lack of optical distortions in the orb, Kemp suggests, is that Leonardo was making an artistic decision to break a rule in the interests of the overall impact of his painting. Distortions in the orb would be distracting. The artist was exercising the Renaissance virtue of decorum, or propriety.

But there are shortcomings in KempвЂ™s analysis. Regarding the significance of the orb, there is no evidence that Leonardo was a neo-Platonist, or even understood what the term meant. Certainly his paintings sometimes contain signs and symbols that refer to the name of the sitter or client, but suggestions that he referenced philosophical ideas as he did the names and coats of arms of his aristocratic patrons remain speculative. As for LeonardoвЂ™s depth of field, the alleged blurriness of ChristвЂ™s face is contradicted by the sharpness of the curls of his hair, which are in the same plane. One excerpt from LeonardoвЂ™s notebooks actually tells painters that if they are painting a figure in the distance, вЂ?do not single out some strands of hair, as the distance nullifies the shine of the hairвЂ™. It is a great mystery why a painting by an artist who studied optics, perspective and light with such intensity should contain two glaring optical inconsistencies. But that is not the greatest mystery of all.

For there is one feature of the Salvator Mundi about which neither Martin Kemp nor any other art historians have said anything at all. Perhaps they have dismissed it, or perhaps they havenвЂ™t noticed it. This feature is so individualistic that it can neither be associated with LeonardoвЂ™s painting nor disassociated from it; it belongs neither to the pictorial traditions of medieval Italy, nor to the symbology of early Christianity, nor to the classicising project of the Renaissance. The SalvatorвЂ™s garments are of only one colour. In every other Italian Renaissance depiction of Christ he wears red and blue, almost always a red tunic and a blue robe. The Salvator wears only a blue garment, adorned with gold filigree embroidery. For the moment we have no explanation for this. Let us call it the blue clue.7 (#litres_trial_promo)

* (#ulink_6763d334-d629-58d5-8ad6-e4d56f1c8e62) Vasari explained why he thought Leonardo belonged to the third phase of the Renaissance: вЂ?In addition to the power and boldness of his drawing, not to mention the precision with which he copied the most minute details of nature exactly as they are, he displayed perfect rule, improved order, correct proportion, just design, and a most divine grace.вЂ™

вЂ (#ulink_934a8a15-85db-5b4b-b86c-5988ed3635bd) He probably saw rock crystal orbs of this transparency and size in Milan in the early sixteenth century. There is a large one in a museum in Dresden which was made in Milan in the 1570s, by which time Milan had become the centre of rock crystal carving in Italy вЂ“ another reason to date the Salvator Mundi to LeonardoвЂ™s second Milanese period.

вЂЎ (#ulink_abb9bbd7-86dc-5e8e-b313-33d329f08ff4) Leonardo wrote: вЂ?The nearest objects will be bounded by evident and sharp boundaries against the background, while those more distant will be highly finished but with more smoky boundaries, that is to say more blurred, or we may say less evident.вЂ™

CHAPTER 7

Vinci, Vincia, Vinsett (#litres_trial_promo)

The word вЂ?provenanceвЂ™, borrowed from French, describes a branch of art historical research the dictionary definition of which is вЂ?a record of ownership of a work of art or an antique, used as a guide to authenticity or qualityвЂ™. It means the history of the collecting of a painting after it has been painted, as it passes from collection to collection. The study of provenance serves a practical economic purpose, since the value of a painting rises according to how important its previous owners were. Kings, queens and emperors are at the top of the scale, while middle-class factory managers are close to the bottom. The role of provenance in the economy of art was already recognised at the end of the seventeenth century. It attracted the curiosity of the Anglo-Dutch philosopher Bernard de Mandeville, who, referring to a series of Raphaels at an English royal palace, remarked:

The value that is set on paintings depends not only on the name of the Master and the time of his age he drew them in, but likewise in a great measure on the scarcity of his works, and what is still more unreasonable, the quality of the persons, in whose possession they are, as well as the lengths of time they have been in great families; and if the Cartoons now at Hampton Court were done by a less famous hand than that of Raphael, and had a private person for their owner, who would be forced to sell them, they would never yield the tenth part of the money which with all their gross faults they are now esteemed to be worth.1 (#litres_trial_promo)

There is also a second use for provenance studies. If the authorship of a painting is in doubt or contested, provenance can offer clues.

The inventories and archives of rich collectors often contain documents with dates and places, which allow one to trace a picture from collector to collector, in reverse chronology, to a time and place close to when and where it was made. This, in turn, can indicate who painted it. The provenance researcher may also consider whether a collector tended to buy originals or copies (sometimes difficult to tell apart connoisseurially, if the copyist is good), or if works by a particular artist were on the market in a particular place during a particular period. If the painting is genuinely a high-quality work, it is more likely to have been in the collection of a ruler or nobleman. An artist was less likely to offer a royal client a painting made by his assistants (though it did happen from time to time), and a ruler, with his team of eagle-eyed art advisers, was less likely to accept one. Often the inventories state in which room the work of art was displayed, and this detail can also become very important. If it was hung in an official hall or reception room, then it was probably an important painting; if it was placed in a corridor, on the stairs, or worse, in a storeroom, it was probably thought of as a second-rate work.

At the heart of this research are the inventories, handwritten on parchment or thick crusts of paper. These can be catalogues of collections compiled by the ownerвЂ™s clerks or вЂ?keepers of picturesвЂ™. They may be itemised lists of works of art available for purchase from a hard-up merchant, or troves of freshly acquired art that are about to be shipped out of Italy, or the valuables that a bride took with her to her new home. In an age when money was not kept in banks, you were what you owned. You didnвЂ™t want your possessions, spread across your many-roomed mansions, to slip away. Largely ignored as a source of information until the late twentieth century, inventories have become the coalface of one of the most fashionable fields of art history today, rich seams of data from which deductions, speculations and occasionally conclusions can be extracted.

While inventories are vital to building a case for attribution for thousands of Renaissance paintings, the raw material is challenging. The fragmentary nature of the records means that most histories have gaps. The names of artists are spelt in many ways, and attributions can change from list to list. Descriptions of the paintings are, until the late nineteenth century, only textual, with scarcely a visual reference. That is an immense problem, because the range of subjects вЂ“ especially biblical and classical вЂ“ was limited, the titles are often similar, artists often made several paintings of the same subject, and the descriptions in the inventories are brief. Dimensions are rarely supplied, and sometimes there is only a title without a painterвЂ™s name attached. The result is that provenance histories for works of art from before the nineteenth century are frequently assembled from a range of probabilities, which reinforce each other. Such structures can be precarious, wobbling between the likely and the hypothetical. The evidence is often circumstantial, but art history is a discipline that studies the products of the imagination; a certain flexibility is permitted, while the marvellous objects themselves have been known to inspire the most rigorous of academic minds to meld fact with fantasy.

Since the author and the date of Robert SimonвЂ™s painting were unknown, he began to research its provenance within weeks of acquiring it. By his own account he spent an hour a day, every day for six years, studying the Salvator. Every Old Masters dealer has to present an account of the provenance of artworks they wish to sell. Most of them subcontract this work to specialists and academics, but Simon is a particularly scholarly dealer, who enjoys the archives and takes pride in his abilities. He had done provenance research many times before the Salvator arrived in his gallery.

The first clue was two initials and a number on the back of the painting: вЂ?CC 106вЂ™. Simon traced that back to the important nineteenth-century Cook Collection, belonging to a British cloth merchant. Some claim that Sir Francis Cook assembled the greatest art collection in private hands in Britain at that time, with the exception of Queen VictoriaвЂ™s. A three-volume catalogue of his treasures was published in 1913. There, Simon discovered his painting, listed as вЂ?cat. number 106вЂ™, on page 123 of Volume I, which was entitled вЂ?Italian SchoolsвЂ™. However, it was not attributed to Leonardo but described as a poor copy, and there was no photograph of the painting in the catalogue. Simon turned to the photo archives.

It was the technology of photography that made modern art history possible. From the mid-nineteenth century specialised photo studios, most famously Alinari in Rome, methodically, accurately and beautifully photographed every notable work of art they could find, supplying an ever-growing market with perfect images, albeit in black and white. Museums and institutions built collections of thousands of photos, while art historians and connoisseurs amassed their own private stockpiles вЂ“ it was a way for them to keep images of all the art they studied and loved close to them, in their homes. The previously uncontainable вЂ“ a vast sea of images spread across many thousands of kilometres, too large and diverse to be committed to memory вЂ“ could now be held in oneвЂ™s hands, spread out on a table or stored in a cupboard.

For art historians, photography was like the spear that enabled cavemen to hunt woolly mammoths. The scholars scribbled notes on the backs of their images, with dates, authorship, and what they knew of the ownership of the painting. By laying out a selection of photographs on their desks they could study, for example, the drapery folds or facial features in a hundred anonymous Renaissance altarpieces and group them according to stylistic traits. They could then associate those stylistic traits with documented works by this or that artist, thus defining his or her oeuvre and, if they had some dates, stylistic development. They could pull out all the pictures they had on a particular subject, like the Last Supper, or the Madonna and Child, or indeed the Salvator Mundi, and, if they knew the dates, arrange them chronologically to see how the treatment of that subject evolved over time, which artists innovated, and which copied those innovations. Thus was born an art history of style and symbol. Acquired over many decades, many of these photographs have survived while the pictures they record have been destroyed or gone missing. They are not just a record of the art we have; they are also a record of the art we have lost.

Robert Simon visited the Witt Library photo archive in the basement of the Courtauld Institute of Art in London. There he accessed all the folders of images marked вЂ?Salvator MundiвЂ™. Soon he found a photograph of the Cook CollectionвЂ™s Salvator, where once again it was listed as a copy. Simon was not surprised by that. Sleepers were almost always miscatalogued, otherwise they would not have вЂ?sleptвЂ™ so long. On the bottom right of the photograph was a typed text reading вЂ?(Cook Coll. Richmond)вЂ™, and underneath, handwritten, вЂ?Whereabouts unknown (1963)вЂ™. So nobody had known where this picture was in 1963.

Parts of the Cook Salvator looked different from the painting Simon had bought. In the Cook photo, Christ had a moustache and facial hair that made him resemble a Mexican bandit in a 1950s B-movie. That indicated that SimonвЂ™s Salvator had been restored or repainted in some way since the date of the photo. However the blessing hand, embroidery, orb and other features of the Cook were identical with SimonвЂ™s painting. Now he could narrow down his search. Before this discovery the painting could have come from any European country, but Simon now had a focus: Britain.

The second clue led back to Britain as well. Everyone in the Old Masters business knows of an etching made by the seventeenth-century print-maker Wenceslaus Hollar which bears an inscription by the artist, вЂ?Leonardus da Vinci pinxitвЂ™, the word вЂ?pinxitвЂ™ testifying that the print was a copy of a painting by Leonardo. It is an image of Christ as saviour of the world, orb in one hand, the other raised in blessing, with flowing curly hair remarkably similar to that in the Simon and Cook painting. The original Leonardo had long been presumed lost. Simon compared his painting to this print. It looked so similar in significant clues вЂ“ its drapery and its blessing hand, even if вЂ“ a significant clue in the contrary direction вЂ“ HollarвЂ™s Christ had a curly beard with a central parting, and his didnвЂ™t.

Simon knew where to go next. There was a particular volume on his shelf which many dealers have, and which is often a first port of call for researching the history of potentially important unknown paintings. One day in 2006 or 2007 вЂ“ he canвЂ™t remember which year exactly вЂ“ Simon pulled out his copy of the Walpole Society Journal, 1972. In it, the keeper of the British royal collection, Oliver Millar, had published an inventory of King Charles IвЂ™s art collection, meticulously turning a few slightly differing seventeenth-century handwritten manuscripts into a hundred-odd pages of neat type. Simon soon came across a description of a work that might match his painting: page 63, item number 49, a вЂ?Peece [sic] of Christ done by LeonardвЂ™. Now he had found a record that Charles I had owned a painting of Christ most likely by Leonardo, and that painting was, in all probability, the one he had bought a 50 per cent stake in for the decidedly unprincely sum of $587.50.

At the recommendation of Martin Kemp, Simon contacted a young art history graduate, Margaret Dalivalle. She had been a student of KempвЂ™s at Oxford and was writing a PhD about notions of the copy and the original in seventeenth-century painting. Simon asked whether she could, as she recalls it, вЂ?contribute to the research into the provenance history of a newly discovered paintingвЂ™.

Dalivalle was born in Ayrshire in Scotland, and showed an artistic bent from an early age, encouraged by her godmother, who worked in a gallery. She studied fine art at Glasgow School of Art, then ran her own business as an exhibition designer. After a few years she returned to study, doing a MasterвЂ™s degree followed by a PhD at Oxford. She now teaches at a number of Oxford colleges as a non-tenured tutor in Renaissance and early modern art history and the history of ideas.

Searching for the Salvator in British archives, Dalivalle thumbed through reams of rarely-consulted documents on thin, yellowed paper, written in faded brownish ink. Under the vaulted sixteenth-century timber ceiling of the Duke Humfrey reading room in the Bodleian Library in Oxford, where each panel is painted with an image of an open book, she pored through manuscripts. She ordered obscure volumes in the Rare Books department of the British Library, the quietest reading room of them all. She went to the archives of the Houses of Parliament, placing old bound volumes of their proceedings and reports between triangular wedges of grey foam so the books could not open flat, to protect their thick spines from damage. She examined bundles of documents in the archives of the royal family.

She hunted through inventories in which Leonardo da Vinci could be written as вЂ?LeonardвЂ™, вЂ?LeonardusвЂ™ or вЂ?LionardвЂ™, and Vinci as вЂ?VinceвЂ™, вЂ?VinciaвЂ™ or вЂ?VinsettвЂ™, and in which there was always the risk that his authorship had been mistaken for that of another Italian Renaissance artist like Raphael, Correggio or Zambelin вЂ“ a strange spelling for Giovanni Bellini. She worked on these complex materials over several years to assemble the illustrious provenance for the Salvator Mundi, which would lead to the auctioneer at ChristieвЂ™s confidently beginning his sale: вЂ?Lot 9b. Leonardo da Vinci. Salvator Mundi, Saviour of the World. The property of three English Kings, Charles I, Charles II and James II.вЂ™

Margaret Dalivalle declined a face-to-face meeting, but we exchanged many emails. She wore her learning a little heavily, to coin a phrase, and was defensive about what she had discovered, which, she said, would be published for the first time in a forthcoming, long-delayed peer-reviewed book. The fact is, a colleague of hers explained to me, her hopes for a permanent university post are dependent on this research, to which she has devoted the last eight years, entirely self-funded.

I learned from Dalivalle how much pride she took in the skills required for her research, and how wary she was of the laymanвЂ™s ability to understand the intricacy of her subject. Individual facts, she advised me, did not matter much on their own in provenance research; one had to consider the whole construction. That was good advice, which could be applied, in ways Dalivalle did not intend, to the broader framework of the Salvator Mundi project. DalivalleвЂ™s work on the Salvator cannot escape the over-arching context of its origin, which was one of commercial interest in a certain outcome. She was given her task over a decade ago by a dealer who wished to sell his painting as a Leonardo, and had been recommended by a professor of art history who had nailed his colours to this cause.

Since its beginning, the art market has always monetised scholarship. It is the scholars who appraise a work of art, and it is customary вЂ“ quite rightly so вЂ“ to pay them for their opinions. Museum boards have always been stuffed with wealthy patrons who privately collect works by the same artists that the museum supports. Dealers have always hobnobbed with curators of public collections вЂ“ the former relish the prestige of selling to a public institution, the latter revel in the excitement of a new discovery. The danger that scholarship can be compromised by showmanship and salesmanship has always been clear and present in the arena of art history. In the case of the Salvator Mundi, such familiar interrelationships were built into the project in a particularly intimate and perilous manner.

PART II (#litres_trial_promo)

CHAPTER 8

The KingвЂ™s Painting (#litres_trial_promo)

The windows were so small, and the light in the palace so poor, that when pictures arrived they were examined by candlelight. On 30 January 1636 the papal emissary, Gregorio Panzani, and a few footmen carried the paintings down the corridors of Whitehall Palace, a higgledy-piggledy agglomeration of banqueting and reception halls, chambers, chapels, breakfast rooms and bedrooms вЂ“ two thousand rooms in all вЂ“ plus tennis courts, gardens and cockpits. They climbed the stairs to the private rooms, or вЂ?closetsвЂ™, of Queen Henrietta Maria. Her Majesty was already in bed, perhaps because of the winter temperature in the palace rather than the lateness of the hour, and she had the pictures вЂ?carried to her bed one by oneвЂ™, as Panzani wrote in his detailed account of the encounter. The art was a gift from Cardinal Antonio Barberini at the Vatican in Rome. The cunning cleric was hoping that the queenвЂ™s husband, the Protestant Charles I, could be induced back to the Catholic faith, and was wooing him with Italian Renaissance paintings, which he knew the king loved. Or perhaps he could at least convince the king to moderate the oppression of Catholics in England. Of that fateful evening Panzani wrote, вЂ?Especially pleasing to the Queen was that by Vinci, and that by Andrea del Sarto.вЂ™ However, the queen said ruefully that she would not be able to keep them for herself, because they were so good that вЂ?the King would steal them from herвЂ™.

Meanwhile, Charles had been informed of the newly arrived masterpieces. He came hurrying down the corridors with a few of his courtiers, including the brilliant architect Inigo Jones, who shared the sovereignвЂ™s enthusiasm for Italian painting. Charles and Jones then played a game. Charles removed the labels bearing the names of the artists which Panzani had attached to each picture, and Jones attempted to identify the worksвЂ™ creators, based on the style and technique. Thus began the discipline of connoisseurship in Britain, a parlour game for the wealthiest strata of society, but also, let us not forget, the sine qua non of the discipline of art history.

Inigo Jones, wrote Panzani, вЂ?threw down his riding cloak, put on his spectacles, took hold of a candle and turned to inspect all of them minutely together with the KingвЂ™. The candle flickered over the outlines of portraits of noblemen and women, lighting up the spidery lace of their collars and cuffs, the sheen of their buckles, buttons and scabbards, and flourishes in their moustaches. Jones вЂ?accorded them extraordinary approvalвЂ™, then pointed to one, and вЂ“ Panzani writes with a trace of the suppressed smirk that one would expect from a citizen of the birthplace of the Renaissance watching the efforts of an English novice вЂ“ вЂ?The KingвЂ™s architect Jones believes that the picture by Leonardo is the portrait of a certain Venetian Ginevra Benci and he concludes it from the G. and B. inscribed on her breast. As he is very conceited and boastful he often repeats this idea of his to demonstrate his great knowledge of painting.вЂ™

Jones got the artist more or less right. This was a painting attributed by everyone at the time to Leonardo, although today it is ascribed to his most sensitive pupil, Giovanni Antonio Boltraffio. But Jones got the identity and gender of the sitter wrong вЂ“ perhaps understandably, given the gloom. He was in fact looking at a beautiful and ethereal image of a young man, his hand inside his cloak covering his heart, gazing slightly askance as if lost in a daydream. The sitter was probably the Italian poet Girolamo Casio. Today the picture hangs at Chatsworth House in Derbyshire.

From Charles IвЂ™s passion for art and for Leonardo da Vinci sprang the birth of the international art market, which has evolved to the business we know today. It began thirteen years earlier, in 1623, when Charles was heir to the throne. He had travelled to Madrid with the intention of returning with a bride, the Spanish Infanta Maria. He failed to win the hand of the Spanish princess, but he did return with a new love вЂ“ art.

According to an account by the English author and diplomat Henry Wotton, Charles had set off for Spain with his friend the courtier George Villiers, Duke of Buckingham, who was then in his early thirties and, according to many who set eyes on him, вЂ?the handsomest-bodied man of England; his limbs so well compacted and his conversation so pleasing and of so sweet dispositionвЂ™.1 (#litres_trial_promo) Charles and Buckingham travelled incognito, вЂ?with disguised beards and borrowed names of Thomas and John SmithвЂ™2 (#litres_trial_promo) and with only three servants. The journey was not as secret as they pretended, however. CharlesвЂ™s father, King James I, had sanctioned this romantic quest after having spent years trying to negotiate the marriage of his son to a Spanish princess, all in vain. Christian Europe had been split in two by the Reformation, with the Roman Catholic empires and the pope on one side, and the Protestants and an assortment of nationalist kingships and independent-minded mini-states on the other. The Catholic Spanish king was loth to marry his daughter to a Protestant prince. CharlesвЂ™s youthful ardour was the last card his father could play.

Charles and BuckinghamвЂ™s planning was slipshod. They didnвЂ™t have the right small change to pay the ferry across the Thames at Gravesend вЂ“ вЂ?for lack of silver, they were fain to give the ferryman a piece of two and twenty shillingsвЂ™3 (#litres_trial_promo) вЂ“ and this immense overpayment aroused suspicions. At Canterbury they were stopped by local officials, but made their escape after Buckingham, who was Lord Admiral of the Fleet, pulled off his beard, revealed his true identity and said he was on his way to perform a surprise inspection of the navy. In Paris the pair bought wigs and charmed their way into the French royal palace, surely with French officials winking at each other over the EnglishmenвЂ™s poor disguises. There they set eyes on Henrietta Maria, the daughter of the French King Henry IV, who would one day be CharlesвЂ™s actual bride. But she was Plan B.

Charles and his minimal retinue made their way on horseback through Spain. To the young tourists it seemed a harsh place. An English diplomat of the time, Sir Richard Wynn, observed how poor rural Spain looked compared to England: windows had no glass, meat was scarce, people used planks for tables, and there were no napkins. Spanish men dressed for all eventualities, wearing capes and carrying swords.4 (#litres_trial_promo) But everything changed when the royal party arrived in Madrid. Charles was put up in the towering fortress-cum-palace of Alcazar. The English king hastily upgraded his sonвЂ™s trip into an official mission and dispatched diplomats. SpainвЂ™s King Philip IV laid out the red carpet and organised festivities. вЂ?All the streets were adorned, in some places with rich hangings, in others with curious pictures,вЂ™ wrote one contemporary.5 (#litres_trial_promo)

Charles rode alongside the Spanish king, under an ornate canopy, through the streets of Madrid, the capital of a freshly baked empire that stretched from North Africa to Latin America. The air reverberated with fanfares of trumpets and drums, while tapestries and carpets hung in decorative celebration from crowded balconies, wafting slowly in the spring breeze. The King of Spain temporarily relaxed the rules that limited the cost of clothing a subject might wear, and offered his nobility loans of up to 20,000 ducats so his court could impress the visiting English prince. There was jousting and bullfighting in the cityвЂ™s enormous central square, the Plaza Mayor. Charles sat in a balcony neighbouring that of the Spanish princess, as close as decorum allowed, and seemed smitten. The spectacle was so expensive that locals joked that Charles had managed to sack the city without an army.

But after the festivities had subsided, Charles found himself locked in a diplomatic pas de deux, with the princess kept out of sight. The problem was still the prospective bride and groomвЂ™s religious incompatibility. If this was to be overcome a special dispensation would be required from the pope, and concessions from the English towards their Roman Catholic subjects, neither of which were forthcoming. Spanish ministers worked to keep Charles in Madrid for as long as possible, in the hope that he would succumb to the artistic and moral superiority of the Roman Catholic faith and consider converting. They contrived for him to be present when King Philip was kissing the feet of the poor, and tipped him off about an English Jesuit who was distributing the enormous sum of ВЈ2,000 in charitable donations to hospitals and religious institutions. The Spanish king gave him paintings with unmistakable messages which laid it on with a gold-plated Catholic trowel, such as TitianвЂ™s glittering Portrait of Charles V with Hound, painted to celebrate the popeвЂ™s coronation of the then Spanish monarch as Holy Roman Emperor in 1530.

Charles, for his part, was trying to engineer a private encounter with Princess Maria. At one point he climbed over a palace wall and вЂ?sprang down from a great heightвЂ™ in order to come face to face with her. But when the princess saw him she вЂ?gave a shriek and ran backвЂ™. Her chaperone told Charles to leave at once, and he withdrew.6 (#litres_trial_promo)

Charles spent eight months hanging around in Madrid, waiting for a breakthrough in the marriage negotiations. He had time on his hands, and he spent it in the company of Buckingham and assorted courtiers and art advisers, visiting the magnificent palaces of the Spanish sovereign and the mansions of his nobles, and shopping for art. In the seventeenth century Spain held much the same power over the English psyche as Paris did in the twentieth: it was the epitome of sophistication. As Ben Jonson wrote in The Alchemist, вЂ?your Spanish Stoop is the best garb; your Spanish beard is the best cut; your Spanish ruffs are the best Wear; your Spanish pavin the best dance; Your Spanish titillation in a glove the best perfume вЂ¦вЂ™, to which he might have added, вЂ?and your Spanish art collection is the best curatedвЂ™.

By this time a small number of English aristocrats and royals, notably the Earl of Arundel and CharlesвЂ™s older brother Prince Henry, had built up collections, sometimes travelling to Europe to see and buy art. Charles had already ordered the purchase on his behalf of cartoons by Raphael in Italy; famous tapestries based on these would be made in London. He also had accepted gifts of pictures from Peter Paul Rubens, EuropeвЂ™s most famous living artist. Now the princeвЂ™s experiences in Spain would supercharge his appreciation of both the beauty of art and the thrall in which it could hold men.

At the time, King Philip IV had the largest art collection in the world, consisting of about two thousand works; by the time of his death forty-two years later that figure would have doubled. A thousand of them were in his enormous palace, the Escorial, on the hills just outside Madrid. Spanish noblemen collected art too, some owning up to six hundred paintings. Their taste was overwhelmingly for Italian Renaissance artists. TitianвЂ™s glamorous portraits, voluptuous mythological scenes and dramatic renditions of biblical stories, with brushwork that gave the impression of spontaneity, dexterity and speed, were the most fashionable; and he was also CharlesвЂ™s favourite painter. Raphael, Michelangelo, Andrea de Sarto and Leonardo da Vinci were almost as highly regarded, but slightly less flashy. The northern Europeans, comparatively dour realists like Memling, van Eyck, DГјrer and others, formed a third group. Art was the educated entertainment that held this elite together.

We know much about this Spanish art world thanks to the vivid Dialogues about Art and Painting, written contemporaneously by the Italian-born, Spanish-resident artist, critic and courtier Vicente Carducho. CarduchoвЂ™s treatise takes us on an eye-opening tour of the best collections in Madrid, where he crossed paths with Prince Charles and his entourage.

His most serene highness King Charles Stuart was determined to acquire paintings of excellent originality. His emissaries are sparing neither effort nor expense searching for the best paintings and sculpture in all of Europe and bringing them back to the English Court вЂ¦ They confirm that the King is going to expand his Palace with new galleries, decorating them with these ancient and modern Paintings and with Statues of foreigners and citizens of that Kingdom, and where he cannot obtain the originals, he has sent artists to copy the Titians in the Escorial.7 (#litres_trial_promo)

Charles and Buckingham were assisted by a number of art advisers. The most prominent was Balthazar Gerbier, a scheming Franco-Dutch courtier, painter and miniaturist whose Leonardesque list of side jobs included mathematician, military architect, linguist, pamphleteer, cryptographer and double agent. CharlesвЂ™s aide Sir Francis Cottington, a less colourful but more reliable individual, kept accounts of the money the prince was spending on art. Charles frequented estate sales, called almonedas, or bought from collectors, or was gifted artworks by noblemen, all to be packed and shipped back to England.

Vicente CarduchoвЂ™s treatise was intended primarily not to paint a picture of the Madrid art world for posterity, but to promote a new theory of art. He was determined to elevate the status of painters and sculptors from that of craftsmen to the same level as poets. He argued for the superiority of painting over sculpture owing to its more scientific and speculative nature, and its ability to create optical illusions. These were arguments Leonardo had made in his notebooks. From Italy to Spain, LeonardoвЂ™s ideas about art underpinned not just the way people made art, but the way they looked at it.

Among the houses Charles and Carducho both visited was the villa of Juan de Espina, a character later described as вЂ?the Spanish LeonardoвЂ™. Charles would have passed through an unprepossessing door in a building in the centre of Madrid and found himself inside a high-walled villa full, as Carducho described it, of beautiful and miraculous things: artworks, rare books, musical instruments, stuffed animals, wooden automata, a telescope designed by Galileo, and historical memorabilia that included a collection of knives that had been used to execute the great and the not-so-good. Espina, a man of вЂ?eminent and erudite witвЂ™,8 (#litres_trial_promo) was not himself an artist, but he was a mathematician and a virtuoso on the lyre and the vihuela (a kind of guitar). He threw parties that lasted until 3 a.m., at which magic tricks were performed, or mock bullfights or giant puppet shows took place. At one party in 1627, as chronicled by Don Juan himself, there was a three-hundred-course banquet at which вЂ?fruit, china, pastries, ceramicsвЂ™ appeared to rise off the table and вЂ?all flew through the windowвЂ™. There were hydraulic machines, influenced by the ideas in LeonardoвЂ™s notebooks, that could make music and storms. And there was a lot of art, as Espina described in his Memorial, written to the Spanish king:

When it comes to rare, curious and beautiful artwork made by the most famous masters from these and other kingdoms and nations, my house in this court can compete with all the extraordinary things worldwide, and even leave them behind, as the experts of all major disciplines have already certified in writing.9 (#litres_trial_promo)

Charles must have thought Espina eccentric, for he called him вЂ?a foolish gentlemanвЂ™, but as a collector he had something the future king wanted. Espina owned two notebooks, now known as the Madrid Codices, full of LeonardoвЂ™s notes and drawings of machines, engineering and geometry. They had been brought to Spain by an Italian sculptor, Pompeo Leoni, who had acquired them from the son of LeonardoвЂ™s pupil Francesco Melzi. Charles tried to buy them while he was in Spain, but Espina refused. As Carducho wrote of his visit to the collectorвЂ™s home:

There I saw two books drawn hand-written by the great Leonardo de Vinci of particular curiosity and doctrine, which Prince of Wales so loved that he wanted them more than anything when he was in this Court: but [Espina] always considered them worthy only to be inherited by the [Spanish] King, like everything else curious and exquisite that he had been able to acquire in his life.10 (#litres_trial_promo)

Years later, Charles spotted another opportunity. One of his art advisers, Henry Porter, heard that Espina had been arrested by the Spanish Inquisition on the grounds that his automata were вЂ?white magicвЂ™. Porter wrote swiftly to London: вЂ?The owner of the book drawn by Leonardo has been taken by the Inquisition and exiled to Seville вЂ¦ I will try my utmost to find out about his death or when his possessions are sold.вЂ™ Espina was, however, released, and later bequeathed his Leonardo notebooks to the Spanish crown. Charles and his courtiers were eventually able to buy some Leonardo drawings from Pompeo Leoni, who had inherited them before he moved to Madrid.

After nearly a year in Spain, Charles and his entourage returned to London infused with MadridвЂ™s enthusiasm for art. A year later he was king. He and his friends formed a circle of aesthetes and collectors, known as aficionados вЂ“ revealingly, a Spanish word вЂ“ which translates as connoisseurs. Dubbed the Whitehall Group, they were determined to import the Leonardesque sophistication of MadridвЂ™s art world to London. They sent their agents to Italy, France, Germany and the Netherlands to find and buy Italian paintings and classical sculptures. They gifted each other paintings, or swapped them, and especially with the king. Art was, as the art historian Francis Haskell noted, вЂ?the continuation of politics by other meansвЂ™.

Among the artworks collected by the aficionados were several Leonardos. CharlesвЂ™s constant companion the Duke of Buckingham owned three by the time he died in 1628, including the Virgin of the Rocks now in the Louvre. However, the dukeвЂ™s efforts to persuade the King of France to part with the Mona Lisa while he was negotiating CharlesвЂ™s marriage to Henrietta Maria in 1625 failed. Charles himself owned three paintings he thought were Leonardos, though only one, the St John the Baptist, is now thought to be the genuine article.

Important visitors to Whitehall Palace, whatever their rank, were marched around on a ceremonial tour of CharlesвЂ™s art collection. At the palaceвЂ™s heart was the two-hundred-foot Long Gallery, in which the king hung around a hundred of his best Renaissance and northern European paintings, including van DyckвЂ™s Cupid and Psyche and Dosso DossiвЂ™s Virgin, Child and Joseph. The kingвЂ™s apartments contained another array of masterpieces by Titian, Correggio, Giorgione and others. Seventy-three smaller pictures were displayed in the intimate cabinet room, along with thirty-six statues and statuettes, as well as books, miniatures, medals and curios. By the time of his death in 1649, Charles I had collected almost three thousand paintings, drawings and sculptures. When Rubens arrived in London in 1629 he wrote:

I must admit that when it comes to fine pictures by the hands of first-class masters, I have never seen such a large number in one place as in the royal palace and in the gallery of the late Duke of Buckingham.11 (#litres_trial_promo)

And so it was that, thanks to the collecting of Charles and his comrades, England could now be counted among EuropeвЂ™s most magnificent monarchies.

It is easy to recognise the art world we know today in Stuart England; the art market emerged from the womb of the late Renaissance almost fully formed. New record prices were being set for art in seventeenth-century Europe, as established collectors from Italy and Spain sold works to new collectors like CharlesвЂ™s circle. Old money was profiting from new money, just as European and American dealers in our era have been able to raise prices for Russian oligarchs and Asian and Gulf billionaires. The historian Edward Chaney writes, вЂ?The craze for the collecting of pictures grew more dramatically in the 1620s and 30s than in any other period in British history.вЂ™12 (#litres_trial_promo)

It was already a world of smoke and mirrors. Smooth-talking dealers were continually trying to pass off copies or studio works, executed by artistsвЂ™ assistants, as originals. In a series of letters dating from 1625 between an agent for Charles I in Rome and the art-dealing resident of a monastery in Perugia, the agent writes that both Charles and Arundel were unhappy about having been sold copies as originals. вЂ?Many scandalous tricks have been played here,вЂ™ he says. On another occasion, the British collector the Duke of Hamilton told his agent to watch out вЂ?that the originals be not retained and copies given in their placeвЂ™. The art market today is still bedevilled by fakes. Meanwhile, collectors had their own underhand playbook. They bought anonymously through agents who were instructed not to divulge whom they were working for, in case knowledge of their wealthy patrons encouraged the sellers to charge higher prices. вЂ?Had it been known that I was acting for his majesty, they would have demanded so much more,вЂ™ the Venice-based art dealer Daniel Nijs wrote about securing the largest bulk purchase of Renaissance and Classical art for Charles I from the Gonzaga dukes of Mantua.

On occasion collectors formed secret anti-competitive syndicates to avoid a bidding war when they bought a collection. The richest buyers often paid late, as they do today, after their dealers had riskily financed acquisitions by borrowing in their own names вЂ“ Charles took three years to finish paying Nijs for the Gonzaga purchase. But Nijs was no saint either: when he bought large collections for English clients he was known to pick off certain works for himself and try to sell them privately before forwarding the pruned consignment to London.

One marked difference between the art market of old and that of today is that in earlier times no one collected art for investment. But at least one canny adviser foresaw the rise of the art market. Balthazar Gerbier boasted prophetically to Buckingham that:

Our pictures, if they were to be sold a century after our death, would sell for good cash, and for three times more than they cost вЂ¦ I wish I could only live a century, if they were sold, to be able to laugh at these facetious folk who say it is money cast away for baubles and shadows. I know they will be pictures still, when those ignorants will be lesser than shadows.13 (#litres_trial_promo)

The Salvator Mundi is said to have spent part of the seventeenth century somewhere in the court of King Charles I. But where? In 1639 Charles instructed Dutch-born Abraham van der Doort, his Keeper of the Pictures вЂ“ a role we would call curator вЂ“ to draw up an inventory of the royal art collection. Once completed, this was the most detailed art catalogue yet produced in Europe. However, back in those days pictures rarely had proper titles. Thus van der Doort had to come up with his own short descriptions, such as вЂ?the picture of an indifferent ancient gentlemanвЂ™. He often mentioned where the king had acquired a work: вЂ?Another Mantuan peeceвЂ™, he repeatedly wrote, referring to the scores of Renaissance paintings and classical sculptures Charles bought from the dukes of Mantua. He was careful to distinguish, where he could, between a work by an artistвЂ™s own hand and one by a studio. Thus, of an вЂ?Item above the door, a picture painted upon a board being a smiling woman with a few flowers in her left hand in a wood-coloured and gilded frame, half so big as the lifeвЂ™, he adds: вЂ?Said to be of Leonard de Vincia or out of his school.вЂ™ Through his entries percolates the character of a methodical civil servant, struggling in a foreign language to establish a uniform system of classification for the first time, and desperate to please his royal employer. A portrait of van der Doort by the English painter William Dobson, executed in a dashing impasto halfway between Titian and Rubens, shows a face with muscles tensed and an anxious expression in his eyes, as if caught for a brief moment before hurrying off.

The most detailed entry in van der DoortвЂ™s inventory is for a Leonardo da Vinci, but not the Salvator Mundi. It is a painting of John the Baptist, a marvellous but relatively simple painting, much the same size as the Salvator. Demonstrating his disdain for Christian propriety, and his penchant for fusing Christian and classical motifs, Leonardo had radically reimagined the iconography of his subject, depicting the saint as a puckish, quasi-Apollonian young man, smiling knowingly at the onlooker, raising one finger in a gesture that seems to beckon us to follow him as it points up to God. Van der Doort writes:

Item, A St John Baptist, with his right finger pointing upwards, and his left hand at his breast, holding in his left arm a cane-cross; done by Leonard da Vinci, sent from France to the King for a present, by Monsieur de Lioncourt, being one of the King of FranceвЂ™s Bedchamber; the picture being so big as the life, half a figure, painted upon board: in a black ebony frame; for which the King sent him back two of his MajestyвЂ™s pictures, the one being the picture of Erasmus Rotterdamus, done by Holbein, being side-faced, looking downwards, which was placed in his MajestyвЂ™s cabinet room; and one other of his MajestyвЂ™s pictures, which was done by Titian; being our Lady, and Christ, and St John, half figures, as big as the life; which was placed in his MajestyвЂ™s middle privy lodging-room вЂ¦14 (#litres_trial_promo)

Van der Doort tells us that Charles got this Leonardo in an exchange with the French courtier and ambassador to London Roger du Plessis de Liancourt. So important was a Leonardo considered that the painting was swapped not just for a Titian, the most fashionable artist in Europe at the time, but also for a Holbein, the German painter who had produced sharply observant portraits of Henry VIIIвЂ™s court.

The alluring golden sfumato effect, which makes St John look as if he has stepped out of Guillermo del ToroвЂ™s fantastical film PanвЂ™s Labyrinth, is partly the result of LeonardoвЂ™s style, but also partly of the mishandling of the picture by its owners. In the left-hand margin van der Doort states that it has been damaged, but not, emphatically not, by him:

The arm and the hand hath been wronged by some washing вЂ“ before I came to your Majesty.

That is the longest entry by far in van der DoortвЂ™s entire catalogue. It may seem strange, then, that he makes no mention of the other supposed Leonardo, the Salvator Mundi, which continues to evade the pens of inventorists. One explanation, which Simon and Dalivalle have suggested in the past, could be that van der DoortвЂ™s catalogue was not exhaustive. He concentrated on the kingвЂ™s collection at Whitehall Palace in central London, but overlooked parts of other palaces, including Hampton Court, the QueenвЂ™s House, Greenwich, and Nonsuch Palace. It is possible that the Salvator Mundi may have hung in one of these locations; or maybe van der Doort just missed it. Such possible shortcomings in his work came to light after he committed suicide in the summer of 1640. Some of his biographers think he took his life out of shame, after having mislaid some of the kingвЂ™s miniatures. A broadsheet of the time suggested alternatively that it was because he was about to be fired for incompetence: вЂ?It is believed he was jealous the King had designed some other man to keepe his pictures, which he had not done.вЂ™ A German poet, George Rudolf Weckherlin, wrote an epigram commemorating van der DoortвЂ™s death:

Anxious to do his duty well,

Van Dort there, conscientious elf,

from hanging up his pictures, fell

One day to hanging up himself.15 (#litres_trial_promo)

Ten years later a second inventory was made of Charles IвЂ™s collection, and this one, the Commonwealth Inventory of 1649вЂ“51, does mention, for the first time, a picture that could be the Salvator Mundi.

At the close of the English Civil War, the defeated king was beheaded in January 1649. Two months later, Parliament, now representing a вЂ?CommonwealthвЂ™, not a вЂ?kingdomвЂ™, decided that all the late kingвЂ™s possessions, including his art collection, should be valued and then sold. The funds raised were to pay off the royal debts вЂ“ the king owed money to hundreds of servants, tradesmen and craftsmen. The historian Hugh Trevor-Roper wrote: вЂ?That gallery to whose formation politics had been sacrificed вЂ¦ was now, in turn, sacrificed to political and ideological revolution.вЂ™16 (#litres_trial_promo)

An inventory was produced for this sale of вЂ?the late kingвЂ™s goodsвЂ™. Item number 49 was a вЂ?Peece of Christ done by LeonardвЂ™. There was only one well-known artist at the time called Leonard, or Leonardo. It is not a very precise description, but just one single-figure type of portrait painting of Christ in LeonardoвЂ™s style has ever been known, and that is as the saviour of the world, or Salvator Mundi. The вЂ?Peece of ChristвЂ™ was valued at a mere ВЈ30.

The Commonwealth InventoryвЂ™s entry for the вЂ?Peece of ChristвЂ™ introduces a new mystery to the painting, namely its price. Thirty pounds for a Leonardo вЂ“ around ВЈ3,000 in todayвЂ™s money вЂ“ is rock bottom for one of the ten most desirable Renaissance masters on the mid-seventeenth-century European art market. But it might add another piece of evidence to the provenance narrative. One of the distinguishing features of SimonвЂ™s Salvator

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