Columbia subject headings:
Harvard subject headings:
Italy--History--19th century--Congresses.
Italy--History--20th century--Congresses.
Nobility--Italy--Biography--Congresses.
Queens--Italy--Biography--Congresses.
Savoy, House of--Congresses.
Women--Italy--Biography--Congresses.
Princeton subject headings:
Italy--Court and courtiers--Biography--Congresses.
Piedmont (Italy)--History--Congresses.
Queens--Italy--Biography--Congresses.
Savoy, House of--Congresses.