Saint Barbara, known in the Eastern Orthodox Church as the Great Martyr Barbara, was an early Christian saint and martyr living in the Greek city Nicomedia, present-day Turkey, or in Heliopolis of Phoenicia, present-day Baalbek, Lebanon. Saint Barbara is often portrayed with miniature chains and a tower. As one of the Fourteen Holy Helpers, Barbara continues to be a popular saint in modern times, perhaps best known as the patron saint of armorers, artillerymen, military engineers, miners and others who work with explosives because of her old legend's association with lightning, and also of mathematicians. Many of her thirteen miracles turn on the security she offered that her devotees would not die without confessing and receiving extreme unction.