The term 'SISTERS' Superior' refers to an ABBESS, a female religious superior in a convent or monastery. An ABBESS is responsible for the spiritual and temporal welfare of the nuns in her charge, and is usually elected by the nuns themselves. She is also responsible for the day-to-day running of the convent, and may be called upon to mediate disputes between the nuns. The ABBESS is the highest authority in the convent, and is often seen as a mother figure to the nuns.