Columbia subject headings:
Catholic Church--Italy--History--19th century.
Catholic Church--Italy--History--20th century.
Italy--Church history--19th century.
Italy--Church history--20th century.
Laicism--Italy--History--19th century.
Laicism--Italy--History--20th century.
Harvard subject headings:
Anti-clericalism--Italy--History.
Catholic Church--Italy--History--20th century.
Church and state--Italy--History
Italy--Church history--19th century.
Italy--Church history--20th century.
Secularism--Italy--History.
Princeton subject headings:
Catholic Church--Italy--History--19th century.
Catholic Church--Italy--History--20th century.
Italy--Church history--19th century.
Italy--Church history--20th century.
Laicism--Italy--History--19th century.
Laicism--Italy--History--20th century.