What automated animal did Leonardo da Vinci design for a 1515 celebration in France?

Leonardo da Vinci designed a mechanical lion for a celebration in France in 1515.

The device was reportedly created for King Francis I and could move or reveal symbolic features through internal mechanisms. Contemporary accounts connect the lion with a royal meeting near Lyon, where it served as a spectacular demonstration of engineering and theatrical design.

The original machine has not survived, so details of its exact construction remain uncertain. Later reconstructions have been based on descriptions and Leonardo’s broader studies of automata, gears, and animal motion.

The mechanical lion is separate from Leonardo’s better-known humanoid robot, which he designed earlier in Milan. Both belong to his work on automata, but the lion was an animal-shaped ceremonial machine rather than an articulated human figure.