What Leonardo da Vinci invention was a revolving crane for lifting heavy loads?

Leonardo da Vinci’s revolving crane was a lifting machine designed to raise heavy materials while allowing the load to be moved around a central support. It belongs to his studies of construction machinery and mechanical advantage.

The crane used a combination of a rotating framework, ropes, pulleys, and a winding mechanism. By changing the direction of force and multiplying it through pulley arrangements, workers could lift loads that were too heavy to raise directly. The rotating structure also helped place materials where they were needed.

Leonardo’s construction drawings reflect practical problems faced by Renaissance builders, including the movement of stone and timber. They also show his habit of breaking complex machines into interacting components that could be adjusted and repaired.

Several different crane designs appear in Leonardo’s notebooks, so the phrase “revolving crane” identifies a type of mechanism rather than one single surviving machine. The drawings are design studies, not evidence of a standardized Leonardo-manufactured model.