Brief Description:  The Grose Bochse (German for "Big Gun") was a massive Teutonic Order bombard cast in 1408. Weighing over 13.5 tons, it was among the largest medieval superguns of its era, featuring a detachable gunpowder chamber and firing stone projectiles estimated between 160–190 kg.

Key Specifications & Design:

Design & Construction: Unlike contemporary forged, wrought-iron weapons like the Pumhart von Steyr, the Grose Bochse was cast in bronze in several distinct pieces. The main barrel and the detachable powder chamber were presumably assembled and locked together using a screw or plug connection.

Weight: The weapon weighed upwards of 13.5 metric tons.

Ammunition: It fired massive stone balls weighing between 160 and 190 kg.

Propellant: Firing the weapon required a massive gunpowder charge, potentially reaching up to 120 kg.

Origins: The bombard was cast in the Teutonic castle of Malbork (Marienburg) between June and September 1408, costing roughly 800 Marks to produce.