titled How to make an angel keep pointing his finger toward the Sun with an angel that would perpetually turn to face the sun. He also drew an automaton of a bird with jointed wings, which led to their design implementation in clocks.

At the end of the thirteenth century, Robert II, Count of Artois, built a pleasure garden at his castle at Hesdin that incorporated several automata as entertainment in the walled park. The work was conducted by local workmen