What armored automaton did Leonardo da Vinci design for a 1495 Milan celebration?

Leonardo da Vinci designed a robotic knight for a 1495 celebration organized in Milan by Ludovico Sforza.

The machine was presented as a seated, armored figure capable of human-like movements. Leonardo’s notes and drawings indicate that cables, pulleys, gears, and a control system could move the knight’s jaw, arms, and head. The design is often described as an early humanoid robot because its mechanisms were arranged inside an armor-shaped body.

No contemporary document confirms that the original machine was completed or publicly demonstrated. The surviving evidence comes mainly from Leonardo’s technical drawings, especially material associated with the Codex Atlanticus. In the late twentieth century, engineers reconstructed the design and found that its mechanism could plausibly perform the movements Leonardo indicated.

The robotic knight should not be confused with Leonardo’s mechanical lion, a separate ceremonial automaton associated with France decades later.