MILITARY INVENTIONS OF LEONARDO DA VINCI IN MILAN AND K. SACCO’S TRACTATE "SEMIDEUS"
The article describes the history of the creation of some military inventions by Leonardo da Vinci with the help of information from the unpublished tractate of the Milan humanist Katon Sacco "Semideus" (1438). As a result of the study, author comes to conclusion that Leonardo da Vinci knew content of the third part of tractate on the military art of Cato Sacco and used the information from it for his engineering inventions.