The Battle of Anghiari (Leonardo)

Uncompleted mural by Leonardo da Vinci

The Battle of Anghiari (1505) was a planned painting by Leonardo da Vinci in the Salone dei Cinquecento (Hall of the Five Hundred) in the Palazzo Vecchio, Florence. Its central scene would have depicted four men riding raging war horses engaged in a struggle for possession of a standard at the Battle of Anghiari in 1440. Many preparatory studies by Leonardo still exist. The composition of the central section is best known through a drawing by Peter Paul Rubens in the Louvre, Paris. This work, dating from 1603 and known as The Battle of the Standard, was based on an engraving of 1553 by Lorenzo Zacchia, which was taken from the painting itself or possibly derived from a cartoon by Leonardo. Rubens succeeded in portraying the fury, the intense emotions and the sense of power that were presumably present in the original painting. Similarities have been noted between this Battle of Anghiari and the Hippopotamus Hunt painted by Rubens in 1616. In March 2012, a team led by Maurizio Seracini announced that they had found evidence that the painting still exists on a hidden inner wall behind a cavity, underneath a section of Giorgio Vasari's fresco in the chamber. The search was discontinued in September 2012, without any further progress having been made, due to conflict among the involved parties. In October 2020, a group of art historians concluded that work had never been executed.

In 1504 Leonardo da Vinci was given the commission by gonfaloniere Piero Soderini, a contract signed by Niccolò Machiavelli, to decorate the Palazzo Vecchio's Salone dei Cinquecento (Hall of the Five Hundred). At the same time his rival Michelangelo, who had just finished his David, was designated the opposite wall. This was the only time that Leonardo da Vinci and Michelangelo worked together on the same project. The painting of Michelangelo depicted an episode from the Battle of Cascina, when a group of bathing soldiers was surprised by the enemy. However Michelangelo did not stay in Florence long enough to complete the project. He was able to finish his cartoon, but only began the painting. He was invited back to Rome in 1505 by the newly appointed Pope Julius II and was commissioned to build the Pope's tomb. Leonardo da Vinci drew his large cartoon in the Basilica of Santa Maria Novella, on the east wall, depicting a scene from the life of Niccolò Piccinino, a condottiere in the service of duke Filippo Maria Visconti of Milan. He drew a scene of a violent clash of horses and a furious battle of men fighting for the flag in the Battle of Anghiari. Giorgio Vasari in his book Lives of the Most Excellent Painters, Sculptors, and Architects praised the magisterial way in which Leonardo had put this scene on paper:

Leonardo built an ingenious scaffold in the Hall of Five Hundred that could be raised or folded in the manner of an accordion. This painting was to be his largest and most substantial work. Since he had a bad experience with fresco painting (The Last Supper; refectory of Santa Maria delle Grazie, Milan), he wanted to apply oil colours on the wall. He began also to experiment with such a thick undercoat (possibly mingled with wax), that after he applied the colours, the paint began to drip. Trying to dry the painting in a hurry and save whatever he could, he hung large charcoal braziers close to the painting. Only the lower part could be saved in an intact state; the upper part couldn't dry fast enough and the colours intermingled. Leonardo then abandoned the project. Michelangelo's and Leonardo's unfinished paintings adorned the same room together for almost a decade (1505–1512). The cartoon of Michelangelo's painting was cut in pieces by Bartolommeo Bandinelli out of jealousy in 1512. The centerpiece of The Battle of Anghiari was greatly admired and numerous copies were made for decades.

Maurizio Seracini, an Italian expert in high technology art analysis, believes that Leonardo's Anghiari is hidden behind Vasari's Battle of Marciano in Val di Chiana (1572). In the upper part of Vasari's fresco, 12 meters above the ground, a Florentine soldier waves a green flag with the words "Cerca trova" ('He who seeks, finds'). In early 2007, the city council of Florence and the Italian Minister of Culture approved further investigation. After unsuccessful attempts to fund the development of a more advanced non invasive scanning system, in December 2011 Seracini and his associates drilled small holes through areas of the Vasari fresco believed to have been previously damaged and restored, hence no longer comprising "original paint" from Vasari's work. An endoscopic probe with a camera was extended into the cavity behind the curtain wall, and the team discovered fragments of pigment and indications of fresco surfacing on the plaster of the inner wall; samples were taken at the time, with the results being announced publicly on 12 March 2012. Seracini believes that this is conclusive evidence for the continued existence of Leonardo's fresco. Seracini's research is highly controversial with strong criticism being levelled against him for drilling the holes. In March 2012 researchers said "the material found behind the Vasari wall shows a chemical composition similar to black pigment found in brown glazes on Leonardo's Mona Lisa and St. John the Baptist, identified in a recently published scientific paper by the Louvre, which analyzed all the da Vinci paintings in its collection." In mid 2012, efforts to investigate the cavity behind Vasari's fresco were discontinued, due to the conflicting views of interested parties, as to whether and how to proceed.