Columbia subject headings:
Normans--Italy--Biography.
Robert Guiscard, Duke of Apulia, Calabria, and Sicily, approximately 1015-1085.
Harvard subject headings:
Civilization, Medieval--Sources
Normans--Italy, Southern--History--Sources.
Normans--Mediterranean Region--Influence.
Robert Guiscard, Duke of Apulia, Calabria, and Sicily, approximately 1015-1085--Influence.
Princeton subject headings:
Civilization, Medieval--Sources.
Normans--Italy, Southern--History--Sources.
Normans--Mediterranean Region--Influence.
Robert Guiscard, Duke of Apulia, Calabria, and Sicily, approximately 1015-1085--Influence.