Columbia subject headings:
Benedict XIII, Antipope, 1342-1423?--Congresses.
Spain--Church history--Congresses.
Harvard subject headings:
Antipopes--Biography--Congresses.
Benedict XIII, Antipope, 1342-1423?--Congresses.
Schism, The Great Western, 1378-1417--Congresses.
Spain--Church history--Congresses.
Princeton subject headings: