Columbia subject headings:
Germany--Church history--19th century.
Germany--Church history--20th century.
Germany--Religion--19th century.
Germany--Religion--20th century.
Modernism (Christian theology)
Secularization (Theology)
Harvard subject headings:
Catholic Church--Germany--History--19th century.
Germany--Church history--19th century.
Germany--Religion--19th century.
Protestant churches--Germany--History--19th century.
Protestantism--Germany--History--19th century.
Princeton subject headings:
Christianity--Germany--19th century.
Christianity--Germany--20th century.
Germany--Religion--19th century.
Germany--Religion--20th century.
Modernism (Christian theology)
Secularization (Theology)