Columbia subject headings:
Alexius I Comnenus, Emperor of the East, 1048-1118.
Byzantine Empire--History--Alexius I Comnenus, 1081-1118.
Harvard subject headings:
Alexius I Comnenus, Emperor of the East, 1048-1118--Early works to 1800.
Byzantine Empire--History--Alexius I Comnenus, 1081-1118--Early works to 1800.
Princeton subject headings: