Saint Barbara is the patron saint of artillerymen. She is also traditionally the patron of armourers, military engineers, gunsmiths, miners and anyone else who worked with cannon and explosives. She is invoked against thunder and lightning and all accidents arising from explosions of gunpowder.
The Spanish word santabárbara and the corresponding Italian word santabarbara mean the powder magazine of a ship or fortress. It was customary to have a statue of Saint Barbara at the magazine to protect the ship or fortress from suddenly exploding.
Saint Barbara is depicted in art as standing by a tower with three windows, carrying a palm branch and a chalice; sometimes cannons are depicted by her side.