Columbia subject headings:
Philosophy, Ancient--History.
Philosophy--Middle East--History.
Philosophy--Study and teaching--Middle East--History.
Harvard subject headings:
Middle East--History--To 622.
Syriac Christians--Intellectual life.
Syrian churches--Middle East--History.
Princeton subject headings:
Philosophy, Ancient--History.
Philosophy--Middle East--History.
Philosophy--Study and teaching--Middle East--History.