Columbia subject headings:
Harvard subject headings:
Catholic Church. Curia Romana
Church history--Middle Ages, 600-1500
Hannover (Germany)--Church history.
Princeton subject headings:
Catholic Church. Curia Romana
Church history--Middle Ages, 600-1500.
Hannover (Germany)--Church history--Middle Ages, 600-1500.
Schism, The Great Western, 1378-1417.