Columbia subject headings:
Harvard subject headings:
Catholic Church. Archdiocese of Cologne (Germany)--Bishops--Biography.
Chapters, Cathedral, collegiate, etc.--Germany--Cologne--History.
Cologne (Germany)--Church history.
Cologne (Germany)--Politics and government.
Kölner Dom. Domkapitel--History.
Princeton subject headings:
Catholic Church. Archdiocese of Cologne (Germany)--Bishops--Biography.
Chapters, Cathedral, collegiate, etc.--Germany--Cologne--History.
Cologne (Germany)--Church history--Middle Ages, 600-1500.
Cologne (Germany)--Politics and government.
Kölner Dom. Domkapitel--History.