What early robotic figure did Leonardo da Vinci design around 1495 for a Milanese pageant?

Leonardo da Vinci designed a mechanical knight around 1495 for a Milanese pageant.

The device is commonly called Leonardo’s robot or the mechanical knight. Leonardo created it while working for Ludovico Sforza, the Duke of Milan. His notes and drawings show an armored figure whose internal system of cables, pulleys, gears, and levers could move its arms, raise its visor, and sit or stand.

The machine was probably intended for entertainment at a court celebration rather than for combat. Renaissance courts often used elaborate mechanical spectacles to display wealth, engineering skill, and artistic imagination. Leonardo’s design placed the control mechanisms inside a human-shaped armored shell, making it an early example of a programmable-looking mechanical automaton.

No original machine has survived, and the exact performance of the historical device is uncertain. In the 21st century, researchers and museum teams built reconstructions based on Leonardo’s codices. The figure is called a robot today, but that term was not used in Leonardo’s lifetime; modern robotics developed many centuries later.