Columbia subject headings:
Harvard subject headings:
Catholic Church. Curia Romana--History.
Church history--Middle Ages, 600-1500
Germans--Italy--Rome--History.
Princeton subject headings:
Cardinals--Italy--Rome--History--Middle Ages, 600-1500.
Catholic Church. Curia Romana
Germans--Italy--Rome--History--Middle Ages, 600-1500.
Germans--Vatican City.