Leonardo da Vinci’s mechanical robot imitated a lion.
Leonardo designed a mechanical lion for a ceremonial occasion in 1515. The machine was reportedly created for King Francis I of France, and accounts say it could walk forward before opening its chest to reveal fleurs-de-lis, the French royal emblem.
The lion was probably an automaton powered by concealed mechanical parts rather than a programmable robot in the modern electronic sense. Leonardo had extensive experience designing gears, cams, linkages, and theatrical machines, all of which could create controlled movement in a large decorative figure.
The original machine did not survive, so modern reconstructions depend on historical descriptions and Leonardo’s broader mechanical knowledge. It is sometimes grouped with Leonardo’s robotic knight, but the two projects were different. The knight was a humanoid mechanical figure described in notes from around 1495, while the lion was a later ceremonial automaton associated with the French court.