Columbia subject headings:
Church and state--Austria--History--19th century--Congresses.
Church and state--Austria--History--20th century--Congresses.
Church and state--Hungary--History--19th century--Congresses.
Church and state--Hungary--History--20th century--Congresses.
Church and state--Slovenia--History--19th century--Congresses.
Church and state--Slovenia--History--20th century--Congresses.
Harvard subject headings:
Alps Region--Church history--Congresses.
Catholic Church--Alps Region--History--Congresses.
Church and state--Alps Region--History--Congresses.
Church and the world--Congresses.
Princeton subject headings: