Columbia subject headings:
Harvard subject headings:
Europe--Foreign relations--Italy--Congresses.
Italy--Foreign relations--Europe--Congresses.
Italy--History--1815-1870--Foreign public opinion--Congresses.
Italy--History--19th century--Congresses.
Nationalism--Italy--History--Congresses.
Princeton subject headings:
Europe--Relations--Italy--Congresses.
Italy--History--1815-1870--Congresses.
Italy--History--1815-1870--Foreign public opinion, European--Congresses.
Italy--Relations--Europe--Congresses.
Public opinion--Europe--History--19th century--Congresses.