What did Leonardo da Vinci’s robotic knight demonstrate through its internal mechanisms?

Leonardo da Vinci’s robotic knight was designed to demonstrate humanoid movement.

Leonardo sketched the knight around 1495 as part of his work on mechanical figures and theatrical automata. The armored figure was intended to sit, stand, raise its arms, and move its head and jaw through a system of pulleys, cables, and gears.

The machine was probably connected with a court entertainment in Milan, although the exact event and whether the original was completed are uncertain. In 2002, roboticist Mark Rosheim built a working reconstruction based on Leonardo’s drawings and notes, showing that the mechanism could plausibly produce several of the proposed movements.

Calling it a modern robot can be misleading. Leonardo’s knight was not electronically programmable and had no artificial intelligence. In historical terms, it was a mechanical automaton: a machine whose stored or externally supplied motion produces a sequence of actions resembling those of a person.