Columbia subject headings:
Arabs--Italy.
Byzantine Empire--History.
Italy--History--476-1268.
Normans--Italy.
Harvard subject headings:
Arabs--Italy.
Byzantine Empire--History.
Italy--History--476-1268.
Normans--Italy.
Princeton subject headings:
Arabs--Italy, Southern--History.
Byzantine Empire--History--527-1081.
Byzantine Empire--Politics and government--527-1081.
Greeks--Italy, Southern--History.
Italy, Southern--History--535-1268.
Normans--Italy, Southern--History.