The Last Leonardo: The Making of a Masterpiece. Ben Lewis

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 – moti mentali, as he described them – 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 – perhaps even feigning surprise – as she hears someone approaching her from behind. She looks shy but inquisitive, demure but also coquettish. The painting was commissioned by the sitter’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, ‘One of you will betray me.’ Their reactions create an undulating wave of emotions on either side of Christ – postures and faces showing surprise, shock, denial (from Judas, clutching a bag of money), shame, anxiety, argument, and even fainting. ‘The painter who wants to have honour in his work,’ wrote Leonardo, ‘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.’

      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, ‘undoubtedly the most curious man who ever lived’, as Kenneth Clark called him.

      Across the notebooks’ pages a dazzling array of thoughts unfold about the natural world and the sciences. The art historian Ernst Gombrich remarked how ‘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.’2 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 Leonardo’s ‘unlettered’ 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 – his early biographer Anonimo Gaddiano wrote that he ‘wore a rose-coloured cloak, which came only to his knees, although at the time long vestments were the custom’. 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 One supposed portrait of him, which may hint at his character, is by his friend Bramante, who, the artist Gian Paolo Lomazzo wrote, used Leonardo’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 ‘lives on rice, milk and other inanimate foods’. 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 – 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 client’s cashier haughtily, ‘I am not a penny painter.’ 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 Leonardo’s assistant Francesco Melzi, wrote that ‘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.’

In this first Milanese period, Leonardo was commissioned to make a monument to the Duke of Milan’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 Leonardo’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 d’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 1502–03 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 Leonardo’s cartoon, which was then reworked or retouched by the great seventeenth-century Dutch painter Rubens – 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