Assassin's Creed 2 Episode 11: Rocky Road

"With all the Pazzi conspirators dead, Ezio Auditore returned to Florence in order to inform Lorenzo de' Medici of his success."
"Knowing that Leonardo da Vinci had left for Venice, which was Ezio Auditore's next destination as well, he set out to find him, so that they could travel together."
"While Ezio Auditore and Leonardo da Vinci were in Romagna, they planned on sailing to Venice by boat. Leonardo had a pass, however, Ezio did not, and had to obtain one quickly before the boat set sail."