Assassin's Creed 2 Episode 4: Judge, Jury, Executioner

"After having his Hidden Blade repaired by Leonardo da Vinci, Ezio returned to La Rosa Colta to meet with Paola. Once there, Paola told Ezio that Uberto Alberti could be found attending an exhibition of Verrocchio's latest work at the Santa Croce cloister. Ezio left to exact his revenge."
"After assassinating Uberto Alberti at a public art show, Ezio had to lower his notoriety before he could leave the city."
"After losing his notoriety, Ezio Auditore returned to Paola, in order to inform his sister and mother of the fate that befell his father and two brothers.
Ezio then decided that they needed to leave Florence and head to Monteriggioni, where his uncle, Mario Auditore, owned a villa."