Siege Defenses by LEONARDO da Vinci
LEONARDO da Vinci
(b. 1452, Vinci, d. 1519, Cloux, near Amboise)

Siege Defenses

1480-82
Drawing
Biblioteca Ambrosiana, Milan

From the Codex Atlanticus.

Leonardo here illustrates an idea for pushing away enemy ladders when defending a fortress. There is no evidence that this was ever built.