Columbia subject headings:
Bishops--Germany--Temporal power.
Cologne (Germany)--Politics and government.
Germany--Politics and government--1273-1517.
Siegfried, von Westerburg, Archbishop of Cologne, approximately 1235-1297.
Harvard subject headings:
Church and state--Germany--Cologne--History.
Cologne (Germany)--Politics and government.
Siegfried, von Westerburg, Archbishop of Cologne, approximately 1235-1297.
Princeton subject headings:
Bishops--Germany--Temporal power.
Cologne (Germany)--Politics and government.
Germany--Politics and government--1273-1517.
Siegfried, von Westerburg, Archbishop of Cologne, approximately 1235-1297.