Columbia subject headings:
Harvard subject headings:
Catholic Church--Foreign relations.
Consalvi, Ercole, 1757-1824.
Papal States--History--1799-1815.
Statesmen--Papal States--Biography.
Princeton subject headings:
Catholic Church--Foreign relations.
Consalvi, Ercole, 1757-1824.
Papal States--History--1799-1815.
Statesmen--Papal States--Biography.