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.
Daniele da Volterra
Daniele's best-known painting is the "Descent from the Cross" in the Trinità dei Monti (circa 1545), after drawings by Michelangelo; by an excess of praise this work was at one time grouped with Raphael's "Transfiguration" and the "Last Communion of St. Jerome" by Domenichino as the most famous pictures in Rome. Daniele's two-sided painting of David killing Goliath (restored in 2008) in the Louvre too seems to have been based on Michelangelo's designs; for a long time it was attributed to him.