The Early Church and Peter's Primacy

Letter LXXVI, from Emperor Marcian to Archbishop Leo

Synopsis: Marcian writes to Leo to assure him that he does not doubt his zeal and prayer for the true religion of Christians and the apostolic faith to remain steadfast, that he received Leo’s legates gladly and with grateful spirit, and to propose that Leo either come to the East in person to celebrate a synod or indicate in his own letters where it should be held — so that sacred letters may be sent throughout the East, Thrace, and Illyricum directing all the most holy bishops to convene and decree, according to the ecclesiastical rules as your holiness has defined, what conduces to the Christian religion and Catholic faith.

To Leo, most reverend bishop of the Church of the most glorious city of Rome — Marcian.

Marcian Receives Leo’s Legates; Invites Leo to Convene a Synod or Designate Its Location; The Council Will Follow Leo’s Defined Rules

On the tenth day before the Kalends of December, at Constantinople, in the seventh consulship of our most pious emperor, our lord Valentinian, and that of Avienus, most illustrious men, sacred letters were sent by our lord Marcian, perpetual emperor, to the most holy bishop Leo — signifying that those sent by the same most reverend man had been joyfully received.

Your Holiness does not doubt our zeal and prayer — for we desire the true religion of Christians and the apostolic faith to remain steadfast and to be preserved with pious devotion by all the people. We do not doubt that the security of our power rests on right religion and the propitiation of our Savior. Therefore we gladly and with grateful spirit, as befits, received the most reverend men whom Your Holiness sent to our piety.

It remains that, if it pleases Your Beatitude to come to these regions and celebrate a synod, you deign to do so with religious zeal — Your Sanctity will satisfy our desires and decree what benefits the sacred religion. If however it is burdensome for you to come to these regions, let Your Holiness signify this in your own letters, so that our sacred letters may be sent throughout the East, Thrace, and Illyricum, directing all the most holy bishops to convene at a designated place of our choosing: and that they may, with their own disposition, declare what conduces to the Christian religion and the Catholic faith — according to the ecclesiastical rules as Your Holiness has defined.

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Notes / Historical Commentary

Letter LXXVI is the turning point of the post-Latrocinium period. Everything that Leo had been pressing since August 449 — the council, the reversal of Ephesus II, the vindication of Flavian, the proper definition of the faith — was now within reach. Marcian, the new emperor who had married Pulcheria and shared her theological convictions, wrote to Leo within three months of taking power, received Leo’s legates gladly, and asked Leo to either attend a synod in person or define where it should be held. The obstruction of fourteen months was over.

The contrast with Theodosius’s letter LXII could not be more complete. Theodosius had written to defend Ephesus II as already settled, to assert that nothing contrary to justice had been done, and to inform Leo that all peace and concord now reigned in the churches. Marcian writes to acknowledge Leo’s legates, express his desire for the apostolic faith to remain steadfast, and place the initiative for the coming council effectively in Leo’s hands. Two emperors, one year apart, from the same imperial court — and the difference between them is the difference between fourteen months of obstruction and a path to Chalcedon.

The phrase “according to the ecclesiastical rules as Your Holiness has defined” is worth dwelling on. Marcian is not proposing a council that will deliberate from scratch, with all parties beginning from equal standing and the assembled bishops reaching whatever conclusion their deliberations produce. He is proposing a council that will operate within the framework of rules Leo has already established — and will declare, in that context, what conduces to the faith. This is precisely what Leo had been requesting from the beginning: not a free Eastern deliberation (which had already produced Ephesus II) but a council operating under the parameters the Apostolic See had defined. The council that actually met — Chalcedon, October 451 — did exactly this: Leo’s Tome was read, the assembled bishops declared “Peter has spoken through Leo,” and the definition they produced confirmed what the Tome had taught. The seed of that outcome is visible in Marcian’s phrase of November 450.

The reader should note that Chalcedon was ultimately held in the East (at Chalcedon, near Constantinople) rather than in Italy as Leo had requested. Leo accepted this modification. What he had sought was not a geographically Western council but a council operating under the doctrinal and jurisdictional authority of the Apostolic See — and that is what he received. The location was a concession; the framework was his.

The Early Church and Peter's Primacy