Columbia subject headings:
Harvard subject headings:
Constantinople (Ecumenical patriarchate)--History.
Council of Blachernae (1285)
Gregorius II, of Cyprus, Patriarch of Constantinople.
Holy Spirit--Procession
Orthodox Eastern Church--Doctrines--History.
Schism--Eastern and Western Church.
Princeton subject headings:
Constantinople (Ecumenical patriarchate)--Doctrines--History.
Gregory II, of Cyprus, Patriarch of Constantinople, 1241-1290.
Holy Spirit--Procession--History of doctrines--Middle Ages, 600-1500.
Orthodox Eastern Church--Doctrines--History.
Orthodox Eastern Church. Council of Blachernae (1285)
Trinity--History of doctrines--Middle Ages, 600-1500.