Columbia subject headings:
Antipopes--Biography.
Benedict XIII, Antipope, 1342-1423?
Church history--Middle Ages, 600-1500.
Harvard subject headings:
Antipopes--Biography.
Benedict XIII, Antipope, 1342-1423?
Church history--Middle Ages, 600-1500
Princeton subject headings:
Antipopes--Biography.
Benedict XIII, Antipope, 1342-1423?
Church history--Middle Ages, 600-1500.