Columbia subject headings:
Harvard subject headings:
Aristocracy (Social class)--Italy--History.
Feudalism--Italy--Rome (Province)--History.
Kings and rulers--Genealogy.
Nobility--Italy--History
Nobility--Italy--Rome (Province)--History--13th century.
Nobility--Italy--Rome (Province)--History--14th century.
Rome (Italy)--History--476-1420.
Princeton subject headings:
Aristocracy (Social class)--Italy--History.
Nobility--Italy--History--12th century--Genealogy.
Nobility--Italy--History--13th century--Genealogy.