Columbia subject headings:
Christian heresies--Byzantine Empire--Congresses.
Christianity and other religions--Byzantine Empire--Congresses.
Heresy--History--To 1500--Congresses.
Theology, Doctrinal--Byzantine Empire--Congresses.
Harvard subject headings:
Byzantine Empire--Church history--Congresses.
Byzantine Empire--Religion--Congresses.
Christian heresies--Byzantine Empire--Congresses.
Christianity and other religions--Byzantine Empire--Congresses.
Heresy--History--To 1500--Congresses.
Theology, Doctrinal--Byzantine Empire--Congresses.
Princeton subject headings: