Columbia subject headings:
Eastern churches--Doctrines.
Eschatology--History of doctrines.
Future life--Christianity--History of doctrines.
Harvard subject headings:
Byzantine Empire--Civilization.
Eastern churches--Doctrines.
Eschatology--History of doctrines.
Future life--Christianity--History of doctrines.
Princeton subject headings:
Eastern churches--Doctrinal and controversial works.
Eschatology--History of doctrines.
Future life--History of doctrines.