The Early Church and Peter's Primacy

Letter XLIX, from Pope Leo to Bishop Flavian of Constantinople

Synopsis: Leo writes to the suffering Flavian to acknowledge that through the deacon who fled from Ephesus he has learned how greatly Flavian endures for the defense of the Catholic faith; assures him that God’s providence always provides necessary help to his own; and tells him that the bearer of the letter will be able to report faithfully the full account of what Leo is working toward in faith and charity.

Leo, bishop, to Flavian, Bishop of Constantinople.

Leo Consoles Flavian and Promises Action

How greatly your beloved endures for the defense of the Catholic faith we have learned through the deacon who fled from Ephesus — greatly grieving. God, however, who strengthens you by the grace of his power, cannot fail to grieve for those through whom the truth is being attacked and the very foundations of the whole Church disturbed. Since the providence of God always provides necessary help to his own, your brotherhood should know that we are leaving nothing undone of those things that ought to be done, so that we may merit to attain first what profits the totality of the faithful.

Meanwhile, let your beloved hold firm, not doubting that it will prove of profit to him for eternal glory. The bearer of this brief letter will be able to report faithfully whatever we are working toward, with the Lord’s help, in our study of faith and charity.

Given on the third day before the Ides of October, in the consulship of Asturius and Protogenes, most illustrious men.

Source/Reference

Notes / Historical Commentary

Letter XLIX is the shortest of Leo’s letters to Flavian and one of the most charged in the whole corpus — not for what it says but for what surrounds it. Flavian of Constantinople had been physically attacked at Ephesus II, deposed by Dioscorus’s proceedings, and removed from his see. He died from injuries sustained at the council, almost certainly before October 13 when this letter was written. Whether Leo knew of Flavian’s death is uncertain; the letter’s consolatory tone — “hold firm, it will prove of profit for eternal glory” — could accommodate either a still-living bishop enduring his trial or an already-fallen confessor. The ambiguity is historical, not rhetorical.

The letter is brief and spare. Leo has nothing new to argue to Flavian — the Tome has been sent, the legates have gone, the Roman Synod has spoken. What remains is personal pastoral presence, and that is what the letter provides. “We are leaving nothing undone” is Leo’s assurance that the Apostolic See is in motion on Flavian’s behalf; “the bearer will tell you more” maintains the discretion appropriate to a communication that might be read by hostile parties. The letter’s sparseness is a sign of trust: Flavian already knows the full theological picture; what he needs now is the assurance that Rome has not abandoned him.

Flavian’s posthumous standing in the Church became one of the central issues at Chalcedon. He was formally vindicated, and his deposition was declared invalid. The Council of Chalcedon’s sixth session explicitly reversed the Ephesine deposition and affirmed that Flavian had died in communion with the Apostolic See. Letter XLIX, whether or not it ever reached its addressee, stands in the record as Leo’s personal word of support to the man who held Constantinople for orthodoxy at the cost of his life.

The Early Church and Peter's Primacy