Columbia subject headings:
Athanasios I, Patriarch of Constantinople, approximately 1230-approximately 1323.
Byzantine Empire--Church history.
Patriarchs and patriarchate--Biography.
Harvard subject headings:
Princeton subject headings:
Athanasios I, Patriarch of Constantinople, approximately 1230-approximately 1323.
Byzantine Empire--Church history.
Patriarchs and patriarchate--Biography.