What clockwork humanoid did Leonardo da Vinci design for a Milanese celebration?

Leonardo da Vinci’s clockwork humanoid designed for a Milanese celebration was the mechanical knight.

Leonardo developed the humanoid automaton around 1495, probably for festivities organized under the patronage of Ludovico Sforza in Milan. The machine was dressed as an armored knight and used a system of cables, pulleys, and gears to create humanlike movements. It may have been able to sit, stand, move its arms, and operate its jaw.

The original machine has not survived, and no complete contemporary description records exactly what it could do. Modern researchers reconstructed the design from Leonardo’s notebooks, producing working models based on the mechanical principles shown in his drawings.

It is often described as a robot, although that modern term can suggest electronic programming or artificial intelligence. Leonardo’s machine was an automaton: a mechanically operated figure powered by physical linkages and stored motion.