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The Treatise includes images of siege weapons and what is probably the first illustration of a firearm: a pot-de-fer. One of the marginal border illustrations in the Milemete Treatise shows a soldier firing a large vase-shaped cannon, the arrow-shaped projectile is seen projecting from the cannon which is pointed at a fortification. In the 1331 siege of Cividale, German knights used guns which were probably very similar to Milemete weapons.
