FLAVIAN, Saint, Patriarch of Constantinople. - A upright and moderate man, he found himself bearing the episcopate in turbulent times (446-49), precisely at the rise of Monophysitism. A Synod (Συνόδος ἐχθρώπων) held under his presidency in Nov. 448 declared Eutyches a heretic and deposed him, of which F. sent a report to Pope St. Leo I.
The latter approved the work of the Synod and replied with the celebrated Epistola ad Flavianum (13 June 449). Theodosius II, influenced by the eunuch Chrysaphius, disapproved of the deposition of Eutyches and convoked a new general Council at Ephesus, giving its presidency to F.'s personal adversary, Dioscorus of Alexandria. At the first session of the "Latrocinium Ephesinum" (8 Aug. 449) Eutyches was declared orthodox, while F. was deposed and so badly maltreated that he died three days later, after having been able to send St. Leo I a warm and urgent appeal. He was rehabilitated by the Fathers of the Council of Chalcedon and numbered among the saints as a martyr.
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Vincenzo Monachino