Cannon of the Amsterdam Admiralty, Gerrit Koster I, 1615
This ship’s gun could fire massive iron balls weighing 18 pounds. The gun was primed by loading a ball with powder and a wad from the front, down the muzzle. The shot would be fired by lighting the fuse at the touch hole. To absorb the recoil, the 400 kilo cannon was mounted on a wheeled carriage. It took eight men to operate the gun.