What did Leonardo da Vinci call his design for 33 small cannons arranged in rows?

Leonardo da Vinci designed a 33-barrel organ, a weapon with 33 small cannons arranged in rows.

The design used three rows of 11 barrels. The nickname “organ” refers to the visual resemblance between the parallel barrels and the pipes of a musical organ. The arrangement was intended to allow one row to fire while another cooled or was reloaded, improving sustained artillery use.

The weapon was a gun battery concept, not a modern machine gun. Each barrel was a separate firearm, and the design depended on loading and firing procedures very different from those of automatic weapons.

Leonardo’s military studies often focused on increasing the rate and flexibility of artillery fire. The 33-barrel organ is one of several Renaissance multi-barrel weapon concepts, but surviving drawings do not establish that Leonardo’s exact design was built and successfully used in combat.