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