Columbia subject headings:
Empresses--Europe--Biography.
Nuns--Europe--Biography.
Queens--Europe--Biography.
Women--Europe--History--Middle Ages, 500-1500.
Harvard subject headings:
Women--Europe--Biography.
Women--Europe--History--Middle Ages, 500-1500.
Princeton subject headings:
Empresses--Europe--Biography.
Nuns--Europe--Biography.
Queens--Europe--Biography.
Women--Europe--History--Middle Ages, 500-1500.