What mechanical figure did Leonardo da Vinci design as a humanoid soldier in armor?

Leonardo da Vinci designed a robotic knight, a humanoid mechanical figure dressed in armor.

The design was prepared around 1495 for a pageant in Milan organized under the patronage of Ludovico Sforza. Leonardo’s notes and drawings indicate that the figure could sit, stand, raise its arms, and move its head and jaw through a system of pulleys, cables, and gears. It was not an electronic robot; it was an automaton powered by mechanical motion.

The original machine has not survived, so historians reconstruct its operation from Leonardo’s technical drawings. In 2002, roboticist Mark Rosheim built a model based on the surviving evidence. Later reconstructions and studies helped show that the mechanism was mechanically plausible.

The phrase “robotic knight” is useful modern shorthand. Leonardo lived centuries before the word “robot” was coined, and the proposed figure was primarily a theatrical automaton rather than an autonomous machine capable of independent decision-making.