Columbia subject headings:
Harvard subject headings:
Catholic Church. Legate (Pesaro e Urbino)
Papal States--History--1815-1870.
Pesaro (Italy)--History.
Pius IX, Pope, 1792-1878.
Rome (Italy)--History--Revolution of 1848-1849.
Princeton subject headings:
Catholic Church. Legate (Pesaro e Urbino)
Papal States--History--1815-1870.
Papal States--Politics and government--1815-1870.