Columbia subject headings:
Harvard subject headings:
Nobility--Italy--Papal States--Correspondence.
Nobility--Italy--Rome--Correspondence.
Papacy--History--1799-1870--Sources.
Papal States--History--1815-1870--Sources.
Pianciani, Luigi, 1810-1890.
Pianciani, Vincenzo--Correspondence.
Rome (Italy)--History--1798-1870--Sources.
Princeton subject headings:
Pianciani, Luigi, 1810-1890--Correspondence.
Pianciani, Vincenzo--Correspondence.