Columbia subject headings:
Byzantine Empire--Foreign relations--Middle East.
Byzantine Empire--History--1025-1081.
Byzantine Empire--History--Comneni dynasty, 1081-1185.
Middle East--Foreign relations--Byzantine Empire.
Harvard subject headings:
Byzantine Empire--Foreign relations--Middle East.
Byzantine Empire--History--1025-1081.
Byzantine Empire--History--Comneni dynasty, 1081-1185.
Middle East--Foreign relations--Byzantine Empire.
Princeton subject headings: