Columbia subject headings:
Harvard subject headings:
Catholic Church--Germany--Cologne--History.
Cologne (Germany)--Church history--Sources.
Cologne (Germany)--History--Sources.
Cologne (Germany)--Social conditions--Sources.
Wills--Germany--Cologne.
Princeton subject headings:
Catholic Church--Germany--Cologne--History.
Ecclesiastical law--Germany--Cologne--History.
Wills--Germany--Cologne--History.