Columbia subject headings:
Harvard subject headings:
Enlightenment--Germany--Congresses
Islam and philosophy--History--18th century--Congresses.
Judaism and philosophy--History--18th century--Congresses.
Philosophy and religion--History--18th century--Congresses.
Princeton subject headings:
Enlightenment--Germany--Congresses.
German literature--18th century--History and criticism--Congresses.
Germany--Religion--18th century--Congresses.
Philosophy, German--18th century--Congresses.