Magazines for the storage of gunpowder barrels were erected throughout the city.  Built of stone, they were either round and domed or square with a pyramidal roof. Most of them were located near bastions, since they were directly related to military readiness and warfare.
Gunpowder magazine next to the Bethlehem Bastion, 1900 - 1902 (G. Gerola, Vikelaia Municipal Library)