In Assassin's Creed II, which historical artist supplies Ezio with inventions and equipment?

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

Leonardo is portrayed as Ezio's friend and technical ally in the Italian Renaissance. After Ezio brings him pages from Altaïr's Codex, Leonardo studies the designs and uses his engineering skills to improve the Assassin's gear. His workshop support gives Ezio access to tools such as the hidden blade, poison blade, and other upgrades.

The game also fictionalizes Leonardo's work on a flying machine, which Ezio uses during a mission in Venice. The device is inspired by Leonardo's real studies of flight, but the game's successful powered flight sequence is part of its fiction rather than a documented historical event.

Michelangelo and Raphael were real Renaissance artists who lived during the same broad period, and Botticelli is another famous Florentine artist. None of them fills Leonardo's inventor and equipment-designer role in Assassin's Creed II.