What name is given to Leonardo da Vinci’s multi-barrel artillery design with 33 small cannons?

Leonardo da Vinci’s multi-barrel artillery design with 33 small cannons is known as the 33-barrelled organ.

The weapon used three rows of eleven barrels mounted on a frame. The rows were intended to be fired in sequence, allowing one group to cool while another was being prepared. This arrangement sought to combine the concentrated fire of many guns with a faster cycle than repeatedly loading a single cannon.

The name “organ” refers to the visual resemblance between the parallel barrels and the pipes of a musical organ. It was not a musical instrument, and it was not a fully automatic machine gun in the modern sense.

Leonardo’s design belonged to his broader work on military engineering in Renaissance Italy. It was never a standard weapon of his army, and surviving evidence does not show that he personally constructed a functioning example.