The famous map of Imola is work of the illustrious artist. It is the first zenith map and the oldest example of a town map still preserved.
Leonardo was called upon by Cesare Borgia in 1502 as a military engineer to inspect the defence system of the Rocca Sforzesca (Fortress). After inspecting the town, he elaborated the famous urban map, with modern intuition and a picturesque touch, and he also traced some sketches of the antique areas of the town.
These documents belong to the Royal Collection of Windsor Castle.