Leonardo da Vinci designed cranes to raise heavy loads on construction sites.
His notebooks contain several lifting machines that combine frames, ropes, pulleys, gears, screws, and counterweights. Some designs were intended to lift materials vertically, while others could move loads horizontally or rotate them into position. These mechanisms reduced the force required from workers and improved control over heavy building materials.
Leonardo did not invent the crane itself. Ancient civilizations had used lifting devices, and medieval European builders employed cranes for churches, fortifications, and other large structures. Leonardo’s contribution was the detailed analysis and refinement of mechanisms, including portable and adjustable designs suited to particular building tasks.
His crane studies are closely connected with his work on architecture, canals, fortifications, and stage machinery. They also show why Leonardo’s notebooks are important to engineering history: they preserve practical observations alongside speculative inventions. A crane is therefore a broad category, while individual Leonardo designs differ in their power source, reach, and method of movement.