In Assassin's Creed II, which Renaissance artist and inventor creates equipment for Ezio?

In Assassin's Creed II, Leonardo da Vinci creates equipment and helps Ezio Auditore with inventions.

Leonardo is one of Ezio's most important allies in the game's Renaissance Italy storyline. He is portrayed as a gifted artist, engineer, and inventor who uses his talents to interpret ancient discoveries and support Ezio's missions. His workshop appears in several major cities during the adventure.

Among the equipment associated with Leonardo are improvements to Ezio's hidden blades and a flying machine used during a mission in Venice. These inventions connect the game's fictional assassination technology with Leonardo's documented interest in anatomy, mechanics, flight, and military engineering.

The historical Leonardo was born in 1452 and died in 1519. Assassin's Creed II places him within a fictional conspiracy involving the Assassins and Templars, so the game should not be treated as a biography. Nevertheless, Leonardo's real artistic reputation, notebooks, and engineering interests provide the basis for his role.