Leonardo da Vinci designed cranes with movable arms for lifting and positioning heavy loads.
His notebooks contain studies of hoists, pulleys, gears, screws, and counterweights. These elements allowed a worker to raise heavy materials with less effort and to move a load horizontally after lifting it. Leonardo’s drawings explored both building-site machinery and devices intended for military engineering.
A crane is defined by its ability to lift and move loads using a projecting arm or boom. Leonardo’s designs were not one standardized machine; they were a family of mechanisms showing how mechanical advantage could make construction tasks more efficient.
Leonardo did not invent the basic crane. Ancient Greeks and Romans already used cranes, and medieval builders continued to develop them. His importance lies in the detailed analysis and inventive rearrangement of established mechanisms. A winch or pulley may appear in a crane, but neither term alone describes the complete lifting machine.