Leonardo da Vinci designed an armored tank-like vehicle with a conical shell and several cannon.
The concept appears in Leonardo’s notebooks from the late fifteenth century, probably during his service to Ludovico Sforza in Milan. Its rounded, sloped cover was intended to deflect enemy fire, while guns around the platform could fire in multiple directions. The vehicle would have been moved by crews turning cranks connected to wheels.
The design is often called Leonardo’s tank, but it was not a modern tracked tank. It had wheels, no engine and no demonstrated battlefield use. A well-known drawing also contains a mechanical problem: the gear arrangement as shown would make the vehicle move in the wrong direction. Historians debate whether this was an error, a copying issue or a deliberate concealment of the design.
The machine illustrates Leonardo’s interest in combining protection, mobility and concentrated firepower. It belongs to Renaissance military engineering rather than to the history of operational armored vehicles.