What automated knight did Leonardo da Vinci design around 1495 for a Milanese festival?

Leonardo da Vinci designed Leonardo’s robot, a mechanical knight developed around 1495 for a Milanese festival.

The automaton was created during Leonardo’s period working for Ludovico Sforza, Duke of Milan. Dressed in medieval armor, it was designed to sit, stand, raise its arms, and move its head and jaw through an internal system of cables, gears, and pulleys. The machine’s movements were controlled by a programmable mechanism using peg positions, an important early example of mechanical automation.

No original robot survives, and historical records do not provide a complete account of a public performance. The design was reconstructed in the twentieth century after researchers studied Leonardo’s notebooks, especially drawings in the Codex Atlanticus.

The robot is often called a humanoid robot, but it was a clockwork automaton rather than an electronic or autonomous robot in the modern sense. Its significance lies in Leonardo’s combination of anatomy, theatrical machinery, armor design, and programmable mechanical motion.