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.
Crucifix (Michelangelo)
Some art historians attributed the work to Michelangelo based only on stylistic criteria, as the sculpture is not documented by contemporary biographers of Michelangelo Ascanio Condivi and Giorgio Vasari. The figure measures and was allegedly made around 1495. In December 2009, an inquiry has been opened into the acquisition of the crucifix by the Italian state. ANSA reports that: "several experts have cast doubts on the attribution, with the doyenne of Michelangelo cross studies, German art historian Margrit Lisner, saying it was probably a Sansovino."