Columbia subject headings:
Harvard subject headings:
Byzantine Empire--Relations--Iran.
Church history--Middle Ages, 600-1500
Iran--Relations--Byzantine Empire.
Jerusalem--History.
Theology--History--Middle Ages, 600-1500
War--Religious aspects--Christianity
Princeton subject headings:
Byzantine Empire--Relations--Iran.
Church history--Middle Ages, 600-1500.
Iran--Relations--Byzantine Empire.
Jerusalem--History.
Theology--History--Middle Ages, 600-1500.
War--Religious aspects--Christianity.