Leonardo da Vinci’s humanoid geared machine was the mechanical knight.
Leonardo designed the mechanical knight around 1495 for a pageant at the court of Ludovico Sforza in Milan. The machine was placed inside armor and used a system of cables, pulleys, and gears to produce humanlike movements. Reconstructions based on Leonardo’s drawings indicate that it could sit, stand, move its arms, and operate its jaw.
The invention reflects Leonardo’s detailed study of human anatomy and mechanics. A machine that imitated a person required coordinated movement across several joints, so its design combined observations of the skeleton with practical control systems. It was probably intended as a theatrical automaton rather than a weapon or autonomous robot.
The mechanical knight is distinct from Leonardo’s mechanical lion, which was a later court spectacle associated with Francis I in France. It is also not evidence of a modern programmable robot: its motion depended on mechanical linkages and preset mechanisms rather than electronic control. The original machine has not survived, but modern reconstructions demonstrate the plausibility of the design.