Columbia subject headings:
Catholic Church--Italy--Historiography.
Catholic Church--Italy--History--19th century.
Catholic Church--Italy--History--20th century.
Italy--Church history--19th century.
Italy--Church history--20th century.
Italy--Religious life and customs.
Harvard subject headings:
Princeton subject headings:
Catholic Church--Italy--History--19th century--Congresses.
Catholic Church--Italy--History--20th century--Congresses.
Italy--Church history--19th century--Congresses.
Italy--Church history--20th century--Congresses.