What humanoid machine did Leonardo da Vinci design for a 1495 Milanese festival?

Leonardo da Vinci designed a robotic knight, probably for a Milanese festival around 1495.

His notebooks contain drawings of a mechanical figure dressed in medieval armor. The internal system used pulleys, cables, gears, and a supporting frame to produce humanlike actions such as sitting, standing, and moving its arms. The machine is often described as an automaton because it was intended to perform programmed mechanical movements.

Leonardo worked in the court of Ludovico Sforza, where elaborate pageants and festivals were important displays of power and artistic skill. A moving armored figure would have fitted that culture of mechanical spectacle. However, contemporary documentation does not confirm that the exact machine in the notebook was completed.

In 2002, engineer Mark Rosheim built a reconstruction based on Leonardo’s drawings. That modern model demonstrated that the design could plausibly move, but it should not be treated as proof that Leonardo’s original prototype survived or operated.