Leonardo da Vinci designed a crane with a long rotating boom for construction work.
Leonardo’s crane studies explored ways to lift and move heavy materials with greater control. His drawings show hoisting mechanisms, ropes, pulleys, gears, and rotating supports that could position a load. The designs were intended for building projects, including the difficult work of raising stone and other heavy components.
A crane is a machine that lifts and moves loads, usually through a combination of a boom, ropes, pulleys, and a winch or hoisting mechanism. Leonardo did not originate the basic idea of the crane; ancient civilizations already used lifting machines. His contribution was the detailed refinement and visualization of mechanisms that could improve construction efficiency.
These sketches should not be confused with his water-lifting screw or his military engines. They belong to a separate group of practical machines concerned with vertical lifting, controlled rotation, and the movement of heavy materials.