Leonardo's Tank in a Bottle is a copy of a 1485 project by Leonardo da Vinci which is found in one of the sheets preserved in the British Museum. Leonardo's project represents a tank in the shape of a tortoise, reinforced with metal plates, surmounted by an internal sighting tower and armed with 360 degree cannons. The movement of the chariot was to be made possible through the operation of a gear system connected to the four wheels. The images document the project and the "work" in the various phases, including external and internal assembly and is complete with base.