Leonardo da Vinci designed a revolving crane that could rotate around a vertical mast while lifting materials.
A revolving crane combines a lifting mechanism with a pivoting arm or frame. By turning around a vertical support, it can move a load through an arc instead of lifting and lowering in one fixed position. Leonardo studied this arrangement for construction and military engineering, where controlled movement of heavy materials was essential.
The design should not be confused with a tower crane, a modern term for a tall construction crane with a horizontal jib. Leonardo’s drawings belong to a much earlier mechanical tradition and were powered by human effort, gearing, winches, or combinations of these devices.
Leonardo’s crane studies reflect his interest in making force useful through machines. His notebooks include hoists, pulleys, winches, and building equipment, but the presence of a detailed drawing does not establish that every proposed crane was built or used on a documented project.