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.
The Last Judgment (Michelangelo)
The work took over four years to complete between 1536 and 1541 (preparation of the altar wall began in 1535). Michelangelo began working on it twenty-five years after having finished the Sistine Chapel ceiling, and was nearly 67 at its completion. Michelangelo originally accepted the commission from Pope Clement VII, but it was completed under Pope Paul III, whose stronger reforming views probably affected the final treatment.