In Assassin's Creed II, which inventor provides Ezio with the first flying machine?

In Assassin's Creed II, Leonardo da Vinci provides Ezio with the first flying machine used in the game.

Leonardo is portrayed as an inventor and artist who becomes one of Ezio's most important allies. He deciphers pages from Altaïr's Codex, produces upgraded equipment, and helps Ezio use a glider based on his experimental designs. The flying-machine sequence sends Ezio over Renaissance Venice during a mission against Rodrigo Borgia.

The game fictionalizes Leonardo's relationship with the Assassin cause, but it places him among real historical people and uses ideas associated with his surviving notebooks. Leonardo's mechanical designs in the game include a tank, a machine gun, and the aerial glider, although their operation is adapted for gameplay.

Leonardo should not be confused with Machiavelli, who serves as a political and Brotherhood ally, or Lorenzo de' Medici, who belongs to the earlier Florentine storyline. The flying machine is specifically linked to Leonardo's inventions and workshop.