Michelangelo
With the completion of the "David" came another commission. In early 1504 Leonardo da Vinci had been commissioned to paint "The Battle of Anghiara" in the council chamber of the Palazzo Vecchio, depicting the battle between Florence and Milan in 1440. Michelangelo was then commissioned to paint the "Battle of Cascina". The two paintings are very different: Leonardo depicts soldiers fighting on horseback, while Michelangelo has soldiers being ambushed as they bathe in the river. Neither work was completed and both were lost forever when the chamber was refurbished. Both works were much admired, and copies remain of them, Leonardo's work having been copied by Rubens and Michelangelo's by Bastiano da Sangallo.
Battle of the Centaurs (Michelangelo)
Michelangelo, at 17, was working under the patronage of Lorenzo de' Medici when he crafted the "Battle of the Centaurs", although the work was not commissioned but created for himself. The work reflected a then current fashion for reproducing ancient themes. Specifically, Michelangelo was inspired by a relief that had been produced for de' Medici by Bertoldo di Giovanni, a work in bronze that hung in the Medici palace. Michelangelo chose to work in marble rather than the more expensive bronze to keep down costs. Bertoldo's work, The "Equestrian Battle in the Ancient Manner"—also known as "Battle (with Hercules)"—was a recreation of a damaged Roman battle sarcophagus and required liberal imagination to fill in the gaps left by the damaged original. Bertoldo took other liberties with his source material and seems to have himself been inspired by the Antonio del Pollaiolo engraving "Battle of the Nudes".