Columbia subject headings:
Christian sects--Europe.
Church and state--Europe--History.
Identification (Religion)--History.
Religious tolerance--Europe--History.
Harvard subject headings:
Christian sects--Europe--History--Congresses.
Church and state--Europe--History--Congresses.
Identification (Religion)--History--Congresses.
Religious tolerance--Europe--History--Congresses.
Princeton subject headings: