What automated humanoid machine did Leonardo da Vinci design for a 1495 court celebration?

Leonardo da Vinci designed a mechanical knight for a court celebration in Milan around 1495. The machine was an armored humanoid automaton whose internal mechanisms could imitate several human movements.

Leonardo’s drawings show a system of cables, pulleys, and gears connected to a rigid frame. The knight was designed to sit, stand, raise its arms, and move its head and jaw. It was probably intended as a theatrical spectacle at the court of Ludovico Sforza, although surviving records do not provide a complete account of a public performance.

The machine is often called Leonardo’s robot, but that modern term can create confusion. It was not an electronic robot and had no programmable computer. It was a mechanical automaton powered by carefully arranged physical mechanisms. Modern researchers built reconstructions from Leonardo’s sketches, helping demonstrate how the proposed movements could have worked.