Columbia subject headings:
Harvard subject headings:
Church and state--Turkey--Istanbul--History.
Church history--Primitive and early church, ca. 30-600--Sources
Councils and synods--Turkey--Istanbul--History.
Istanbul (Turkey)--Church history.
Princeton subject headings:
Byzantine Empire--Church history.
Church history--6th century.
Jesus Christ--History of doctrines--Early church, ca. 30-600.
Synod of Constantinople (536)