What Leonardo da Vinci design used a pyramid-shaped canopy as a parachute?

Leonardo's parachute is the pyramid-shaped canopy design described in his notebooks.

Leonardo sketched the parachute in the Codex Atlanticus around 1485. His design consisted of a sealed linen canopy supported by poles, forming a pyramid approximately 7.2 metres high and 7.2 metres wide at its base. He reasoned that a person could descend safely from a great height with the device.

The drawing is an important early example of parachute engineering, but there is no evidence that Leonardo tested it. In 2000, British adventurer Adrian Nicholas made a replica from modern materials and successfully tested it, although he used a conventional parachute for the final part of the descent because the replica was difficult to steer.

Leonardo's design predates practical parachutes by centuries. It is not the same as the compact, fabric parachutes used today, which depend on different shapes, suspension lines, and deployment methods.