Columbia subject headings:
Catholic Church--Europe--History--19th century.
Catholic Church--Europe--History--20th century.
Nationalism--Europe--History--19th century.
Nationalism--Europe--History--20th century.
Harvard subject headings:
Catholic Church--Europe--History--19th century.
Catholic Church--Europe--History--20th century.
Nationalism--Europe--History--19th century.
Nationalism--Europe--History--20th century
Princeton subject headings:
Catholic Church--Europe--History--19th century.
Catholic Church--Europe--History--20th century.
Nationalism--Europe--History--19th century.
Nationalism--Europe--History--20th century.