Perpetuum Mobile of Villard de Honnecourt (about 1230).
Among the mechanical devices Villard sketched are a perpetual-motion machine, a water-driven saw, a number of automata, lifting devices, war engines (a trebuchet) as well as a number of anatomical and geometric sketches for portraiture and architecture. The claim that he drew a simple escapement mechanism, the first known in the West, is now questioned.
Villard's vast diversity in his sketchbook has caused him to be compared to such great minds as Leonardo Da Vinci, who also specialized in many different categories of art and science.
Perpetuum Mobile of Villard de Honnecourt (about 1230). 
