Leonardo da Vinci drew a crane with a helical screw and a rotating platform for lifting heavy loads.
His crane studies show how he analyzed construction machinery through gears, winches, counterweights, and screw mechanisms. A helical screw could help raise or lower a load, while a rotating base would allow workers to move the load horizontally. These features addressed two central problems in construction: lifting material and placing it accurately.
Leonardo did not invent the crane itself. Ancient Greek and Roman builders already used cranes, and medieval engineers developed many forms of hoisting equipment. His contribution was to record and refine mechanical arrangements with unusually detailed drawings and observations.
The sketches are therefore best understood as engineering studies rather than proof that every depicted machine was constructed. Leonardo’s crane designs also belong to the wider Renaissance effort to recover, improve, and mechanize classical building techniques.