Mortars Firing into a Fortress

This drawing shows four mortars outside bombarding the fortress wall with one part of the wall is crumbling. The mortars are placed on earthworks and direct their fire into the fortress. The mortars protected from assault by the debris of the collapsed wall. 

Takac, Balasz. “Neptune, c. 1504-5.” Widewalls, 9 Feb. 2019, www.widewalls.ch/leonardo-da-vinci-drawings/neptune-c-1504-5/.