Columbia subject headings:
Christianity--Europe--Congresses.
Church and the world--Congresses.
Democracy--Europe--Congresses.
Democracy--Religious aspects--Christianity--Congresses.
Liberalism--Religious aspects--Christianity--Congresses.
Harvard subject headings:
Christianity and politics--Europe--History--Congresses.
Democracy--Europe--History--Congresses.
Political ethics--Europe--History--Congresses.
Princeton subject headings:
Christianity and politics--Europe--History--Congresses.
Democracy--Europe--History--Congresses.
Political ethics--Europe--History--Congresses.