Ezio Auditore da Firenze (1459 – 1524) was a Florentine nobleman during the Renaissance, and, unbeknownst to most historians and philosophers, a Master Assassin and the Mentor of the Italian Brotherhood of Assassins, a title which he held from 1503 to 1513. He is also an ancestor of William and Desmond Miles, as well as Clay Kaczmarek.