Columbia subject headings:
Germany--Church history--843-1517.
Xanten, Ger. (Archdiaconate)--History.
Harvard subject headings:
Catholic Church. Archdeaconry of Xanten (Germany)--History.
Xanten (Germany : Archdeaconry)--History.
Xanten (Germany)--Church history.
Xanten, Ger. (Archdeaconry)--History.
Princeton subject headings: