What Leonardo da Vinci design resembles a pyramid-shaped parachute?

Leonardo da Vinci designed a pyramid-shaped parachute. His drawing appears in the Codex Atlanticus, a collection of Leonardo’s notes and sketches assembled from his papers.

The design uses a large linen canopy held open by a framework of wooden poles. Leonardo wrote that a person could descend safely from a height if the structure were about 12 braccia wide and 12 braccia deep. The braccio was a historical Italian unit, so the exact modern conversion varies.

Leonardo did not test the parachute, and it was not a practical manufactured device in Renaissance Italy. The sketch is nevertheless an important early study of controlled descent. It is often confused with his flying-machine studies, but a parachute slows a fall rather than generating powered flight. Modern parachutes use flexible fabric, suspension lines and a harness instead of a rigid pyramid frame.