What Leonardo da Vinci machine was designed to move heavy loads using a rotating platform?

Leonardo da Vinci designed a revolving crane to move heavy loads using a rotating platform.

His crane studies combined a lifting mechanism with a platform that could turn, allowing a load to be raised and swung into a new position. The drawings show Leonardo’s interest in improving construction machinery through gears, screws, cables, and carefully arranged supports. Such equipment would have been useful for building projects and for handling heavy materials.

The revolving crane was a design study rather than a clearly documented machine that Leonardo built and operated. Renaissance engineers already used cranes, hoists, and treadwheel systems, so Leonardo’s contribution was the refinement and combination of mechanisms rather than the invention of lifting itself.

This crane should not be confused with Leonardo’s military vehicles or water machines. Its defining feature is the rotating support that changes the load’s horizontal position after lifting.