What automated knight did Leonardo da Vinci design for a Milanese court spectacle?

Leonardo da Vinci designed a mechanical knight, an early humanoid automaton intended for a Milanese court spectacle.

Leonardo prepared the design around 1495 while working for Ludovico Sforza in Milan. The figure wore armor and was built around a system of pulleys, cables, and gears. Those mechanisms could reproduce movements such as sitting, standing, and moving its arms. The design reflects Leonardo's close study of human anatomy and mechanical motion.

No complete original machine has survived, and historians cannot confirm that the automaton was actually displayed in Leonardo's lifetime. In 2002, roboticist Mark Rosheim constructed a working model based on Leonardo's drawings and notes. The reconstruction demonstrated that the mechanical principles could produce the proposed movements.

The mechanical knight is often called Leonardo's robot, but the modern word robot did not exist in Renaissance Italy. It was an automaton: a self-moving mechanical figure, not an artificial intelligence system or an electrically powered machine.