The Early Church and Peter's Primacy

Letter CXLIV, from Pope Leo to Julian, Bishop of Cos

Synopsis: Leo thanks God and praises Julian’s diligence — whose vigilance against the heretics’ snares has not failed him in anything — reports that the Eutychianist stirrings after Marcian’s death have been crushed through Julian’s efforts and those whom the Spirit of God moved with him; notes that rumors are arriving from Alexandria of popular disturbances that Leo cannot yet fully report since the acts are not yet fully known; and charges Julian to ensure that whatever has happened cannot be allowed to prejudice the holy Chalcedonian synod.

Leo, pope, to Julian, Bishop of Cos.

Julian’s Diligence Has Not Failed; the Eutychian Stirrings After Marcian’s Death Are Crushed; Rumors From Alexandria Require Vigilance

Thanks be to God — that in all things pertaining to the state of the Church and the mystery of the faith, your brotherhood’s industry has not failed me in anything: which I understand to watch vigilantly lest the snares of the heretics prevail in anything against the evangelical and apostolic doctrine. Since, as you deign to report, the things which the Eutychianists strove to stir up after the death of the prince of venerable memory Marcian have been destroyed — through your efforts and those whom the Spirit of God moved with you, the cause itself being furthered by the truth — because truly both to your brotherhood and to all the faithful of Christ, and above all to the glorious and Catholic Augustus, as we are confident, nothing is more fruitful for eternal beatitude than that the things founded by the Author of our hope himself be violated by no wickedness of perverse men, but remain in the secure peace of the Church’s perpetual tranquility. What therefore has been piously and profitably accomplished with the Lord’s aid — let it be strengthened by persevering effort.

For certain rumors are reaching Us of the outrages of the Alexandrian people — which We cannot report more fully, since We have not yet learned in their entirety the deeds that are said to have occurred. But this must be labored for on behalf of the universal Church: that if the things said to have been done are true, they cannot be allowed to prejudice the holy Chalcedonian synod — so that what was defined for the salvation of the whole world by the instruction of the Holy Spirit may remain inviolate.

Dated the Kalends of June, in the consulship of Constantinus and Rufus.

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Notes / Historical Commentary

Letter CXLIV belongs to a pivotal moment in the Leo corpus. Marcian — the imperial partner who had provided the enforcement mechanism for the Chalcedonian settlement throughout the post-451 correspondence — had died in January 457. The Eutychian party, long suppressed by a combination of Leo’s ecclesiastical authority and Marcian’s imperial power, immediately tested the new situation. Julian’s intelligence, reported here, is that the initial stirrings have been crushed. But the Alexandrian rumors Leo mentions are the beginning of something far more serious.

Proterius of Alexandria — installed after Dioscorus’s deposition, defended through the entire post-Chalcedon correspondence, whose faith-profession Leo had praised in Letters CXXIX and CXXX — had been murdered by an Eutychian mob on March 28, 457, and Timothy Aelurus installed in his place. Leo writes on June 1 with only partial information: “rumors of outrages” that he cannot yet report fully. The full crisis would unfold in Letters CXLVII onward — the letters Leo addressed to the new emperor Leo I, to Anatolius, and to the Eastern bishops demanding Proterius’s vindication and Timothy’s removal.

The letter’s closing charge — that whatever has happened cannot be allowed to prejudice the Chalcedonian synod — is the standing principle applied to a new crisis. The principle does not change with the emperor; it does not depend on Marcian’s enforcement. What the Holy Spirit defined at Chalcedon remains inviolate regardless of what mobs accomplish in Alexandria. This is Leo’s characteristic response to every attack on the Chalcedonian settlement: the canonical and theological foundation holds; the task is to ensure that those who act against it do not profit from their actions.

The Early Church and Peter's Primacy