Columbia subject headings:
Catholic Church and philosophy--Congresses.
Catholic Church--Germany (West)--History--19th century--Congresses.
Catholic Church--Germany (West)--History--20th century--Congresses.
Modernism (Christian theology)--Congresses.
Philosophy and religion--Congresses.
Harvard subject headings:
Catholic Church and philosophy--History--19th century--Congresses.
Catholic Church and philosophy--History--20th century--Congresses.
Catholic Church--Germany--History--19th century--Congresses.
Catholic Church--Germany--History--20th century--Congresses.
Philosophy, German--Congresses.
Princeton subject headings: