Date of Birth: 1434.
Profession: Condottiero, Noble.

One of several important condottieri patrolling the Tuscan countryside, Mario Auditore was a born leader. He began his military career as a six-year-old, when he played a significant role in the Florentine and Milanese conflict at the Battle of Anghiari. While on an expedition to Monterchi with his father, he alerted the Florentine general Micheletto Attendolo to the appearance of several dust clouds over the road which signalled a surprise advance by Milanese troops. Thanks to Mario, the Milanese attack was foiled and the Florentines won the battle.

Although Mario sided with Florence during Anghiari, for most of his career he defended the interests of his hometown Monteriggioni, derailing Florentine attempt to seize Tuscan territory.

While Mario's younger brother, Giovanni, moved to Florence in 1454 to pursue a career in banking, Mario stayed at the family's villa in Monteriggioni, stating in a letter to Giovanni that he "preferred fighting like a man, to filling out balance sheets".

After Giovanni's death, Mario brought Ezio, Claudia and Maria to the family Villa and taught Ezio about the conflict between the Assassins and Templars. Ever since, Ezio and his uncle have been inseperable.