Which Leonardo da Vinci invention is often described as an early parachute?

Leonardo da Vinci's pyramidal parachute is often described as an early parachute design.

Leonardo sketched the device in the Codex Atlanticus, using a pyramid-shaped canopy supported by a wooden frame. His notes proposed a structure about 12 braccia wide and 12 braccia deep, with a corresponding height. The braccio was a historical Italian unit whose exact length varied, so modern conversions are approximate.

Unlike a modern parachute, Leonardo's design used rigid or semirigid supports rather than a flexible fabric canopy. He claimed that a person could descend safely from a great height with it. For centuries, nobody could test the proposal directly, but modern reconstructions have shown that a carefully built version can generate substantial drag. In 2000, British skydiver Adrian Nicholas tested a reconstruction based on Leonardo's drawing, though he used a modern parachute for the final landing.

The design is not evidence that Leonardo invented modern parachuting. It is better understood as an unusually early, detailed analysis of controlled descent through air.