Columbia subject headings:
Harvard subject headings:
Christianity and atheism--History--18th century--Congresses.
Christianity and culture--History--18th century--Congresses.
Christianity and other religions--Islam--Congresses
Christianity--Germany--History--18th century--Congresses.
Islam--Relations--Christianity--Congresses
Religious tolerance--History--18th century--Congresses.
Princeton subject headings:
Christianity and atheism--History--18th century--Congresses.
Christianity and culture--History--18th century--Congresses.
Christianity and other religions--Islam--Congresses.
Christianity--Germany--History--18th century--Congresses.
Islam--Relations--Christianity--Congresses.
Religious tolerance--History--18th century--Congresses.