Columbia subject headings:
Harvard subject headings:
Caserta (Italy)--History--To 1500.
Italy, Southern--History--535-1268.
Normans--Italy, Southern.
Normans--Italy--Sicily.
Sicily (Italy)--History--1016-1194
Princeton subject headings:
Caserta (Italy)--History--To 1500.
Italy--History--476-1268.
Normans--Italy.