Columbia subject headings:
Harvard subject headings:
Bishops--Germany--History--17th century--Congresses.
Bishops--Germany--History--18th century--Congresses.
Catholic Church--Political aspects.
Church and state--Germany--History--17th century--Congresses.
Church and state--Germany--History--18th century--Congresses.
Germania sacra--Congresses.
Germany--Church history--17th century--Congresses.
Germany--Church history--18th century--Congresses.
Princeton subject headings:
Catholic Church--Political aspects.
Holy Roman Empire--Kings and rulers.
Holy Roman Empire--Politics and government.