The Battle of Anghiari (Leonardo da Vinci)
In 1504 Leonardo da Vinci was given the commission by gonfaloniere Piero Soderini, a contract signed by Niccolò Machiavelli, to decorate the Hall of 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.
St. Michael Vanquishing Satan
Raphael's contemporary, Sebastiano of Venice, wrote to Michelangelo in July of the year the painting was completed to complain of the coloring of the work, suggesting that the figure looked smoky or made of iron because of the exaggerated contrast between the two sides. This may have been the hand of Giulio Romano, who according to art historian Eugène Müntz overused black in a heavy-handed fashion to "obtain a more powerful effect." To deal with coloring issues, the painting was restored in 1537–1540 by Francesco Primaticcio. Following further restoration in 1685, it was transferred from the original wood to canvas in 1753.