Columbia subject headings:
Councils and synods, Plenary.
Councils and synods--Byzantine Empire.
Orthodox Eastern Church--Government.
Harvard subject headings:
Councils and synods, Plenary.
Councils and synods--Byzantine Empire.
Orthodox Eastern Church--Government.
Princeton subject headings:
Councils and synods, Plenary.
Councils and synods--Byzantine Empire.
Orthodox Eastern Church--Government.