Columbia subject headings:
Harvard subject headings:
Ecumenical movement--Congresses.
Europe--Church history.
Holy Roman Empire--History.
Reformation
Regensburg (Germany)--History.
Regensburg Colloquy of 1541 (1541 : Regensburg, Germany)--Congresses.
Princeton subject headings:
Colloquy of Ratisbon (1541)--Congresses.
Ecumenical movement--Congresses.