Columbia subject headings:
Constantinople (Ecumenical patriarchate)--Congresses.
Harvard subject headings:
Constantinople (Ecumenical patriarchate)--Congresses.
Princeton subject headings:
Byzantine Empire--Church history--Congresses.
Byzantine Empire--Historiography--Congresses.
Christian literature, Byzantine--History and criticism--Congresses.
Constantinople (Ecumenical patriarchate)--Congresses.
Orthodox Eastern Church--Greece--History--Congresses.
Orthodox Eastern Church--Turkey--History--Congresses.