In Assassin's Creed II, which Renaissance artist helps Ezio Auditore by building equipment for him?

In Assassin's Creed II, Leonardo da Vinci helps Ezio Auditore by building and modifying equipment for him.

Leonardo is introduced as one of Ezio's close allies during the Italian Renaissance. He studies the Codex pages left by Altaïr and uses his engineering knowledge to create practical improvements, including Ezio's hidden-blade upgrades. His workshop in Florence and later Venice gives Ezio access to new tools as the story progresses.

The game draws on Leonardo's documented interests in anatomy, mechanics, art, and flight, while placing him inside a fictional Assassin narrative. It also references historical works and patrons without claiming that Leonardo actually belonged to a secret order.

Michelangelo, Raphael, and Botticelli were real Renaissance artists who appear elsewhere in the series' cultural setting, but they are not Ezio's principal equipment designer. Leonardo's combination of historical identity, scientific curiosity, and hands-on engineering makes his supporting role especially memorable.