What mechanical knight did Leonardo da Vinci design for a Milanese celebration?

Leonardo da Vinci’s mechanical knight is commonly called Leonardo’s robot. He designed it around 1495 for a Milanese celebration connected with the court of Ludovico Sforza.

The robot was built as an armored humanoid figure containing gears, cables, pulleys, and a supporting frame. Reconstructions based on Leonardo’s drawings indicate that it could make human-like movements such as sitting, standing, and moving its arms, although the exact original performance is uncertain.

The machine is sometimes confused with Leonardo’s self-propelled cart. The cart was a separate spring-powered vehicle controlled by cams, while the robot was a humanoid automaton. Leonardo’s surviving notebooks do not provide a complete step-by-step construction manual, so modern replicas necessarily interpret incomplete evidence.

The design demonstrates Leonardo’s interest in anatomy, mechanics, and theatrical engineering. It is one of the earliest well-documented concepts for a humanoid mechanical device.