Columbia subject headings:
Charles I, King of Naples, 1226-1285.
Conradin, Duke of Swabia, 1252-1268.
Harvard subject headings:
Charles I, King of Naples, 1226-1285.
Conradin, Duke of Swabia, 1252-1268.
Princeton subject headings:
Charles I, King of Naples, 1226-1285.
Naples (Kingdom)--History--Anjou dynasty, 1268-1442--Early works to 1800.