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.
Leda and the Swan (Michelangelo)
Several years passed without the commission being formalised until Michelangelo had to be in Ferrara in 1529 to inspect its city walls as "governor general of fortifications" for the Florentine Republic, ready for an expected Imperial siege. On that occasion the Duke held Michelangelo to his promise and according to Condivi and Vasari he produced the work when he returned to Florence in August 1530 after the city's fall, perhaps using the time he had to spend in hiding. It was a square work in tempera, representing Jupiter as a swan making love to a reclining Leda (based on a composition from ancient Roman gems and seals), an egg and Castor and Pollux as children.