In Assassin's Creed II, which artist and inventor designs machines for Ezio?

In Assassin's Creed II, Leonardo da Vinci designs machines and equipment for Ezio.

Leonardo is introduced as Ezio Auditore's close friend and technical ally in Renaissance Italy. He helps decode pages from Altaïr's Codex and uses his engineering knowledge to improve Ezio's weapons and tools. His workshop is therefore a recurring practical resource as well as a story location.

The game fictionalizes Leonardo's involvement in Assassin history while placing him among recognizable Renaissance settings and people. His inventions include improvements to the hidden blade and a flying machine used during a mission over Venice. These sequences blend historical reputation with the series' fictional conflict between Assassins and Templars.

Michelangelo, Donatello, and Raphael were also major Renaissance artists, but they are not the inventor who equips Ezio in Assassin's Creed II. The title's Leonardo is based on the real Florentine polymath, whose surviving notebooks document interests in anatomy, engineering, flight, and mechanics.