Bridges
Given the crucial importance of waterways as communication routes in times of peace and obstacles to overcome in times of war, Leonardo devoted himself to designing structures capable of regulating or crossing them.
His bridges can be divided into three categories based on their intended function: military-use bridges, such as the quickly constructed bridge; those designed for an utopian ideal city, like the double-deck bridge and the drawbridge; and finally, commissioned bridges, including the canal bridge with locks requested by the City of Florence to plan the diversion of the Arno River during the war against Pisa.