Barbara is the patron saint of artillerymen, military engineers, miners and others who work with explosives. Her association with the lightning that killed her father has caused her to be invoked against lightning, explosives and fire. She is also the patron saint of mathematicians.

As one of the Fourteen Holy Helpers, Barbara is a popular saint, perhaps best known as the patron of armourers, artillerymen, military engineers, miners and others who work with explosives because of her legend's association with lightning, and also of mathematicians.

The Orthodox Church holds to many of the same beliefs as the Catholic Church, but in different ways. They would agree on the importance of scripture and tradition and the views on the Eucharist, but disagree as to which traditions. They do not hold to a Pope, but they do have their own ruling body.

The Great Schism came about due to a complex mix of religious disagreements and political conflicts. One of the many religious disagreements between the western (Roman) and eastern (Byzantine) branches of the church had to do with whether or not it was acceptable to use unleavened bread for the sacrament of communion.