Columbia subject headings:
Harvard subject headings:
Alexius I Comnenus, Emperor of the East, 1048-1118.
Byzantine Empire--History--Alexius I Comnenus, 1081-1118.
Byzantine Empire--History--John II Comnenus, 1118-1143.
John II Comnenus, Emperor of the East, 1088-1143.
Princeton subject headings:
Byzantine Empire--History--Alexius I Comnenus, 1081-1118.
Byzantine Empire--History--John II Comnenus, 1118-1143.