Letter 104: By the great bounty of God's mercy the joys of the whole Catholic Church were multiplied when through your clemency's holy and glorious zeal the most pestilential error was abolished among us; so that our labours the more speedily reached their desired end, because your God-serving Majesty had so faithfully and powerfully assisted them. For alth...

Pope Leo the GreatEmperor Marcian|c. 453 AD|Pope Leo the Great|Human translated
arianismchristologydiplomaticgrief deathimperial politicspapal authorityproperty economics
Barbarian peoples/invasions; Theological controversy; Imperial politics

Leo, Bishop of Rome, to the Emperor Marcian Augustus, by the hand of Lucian the bishop and Basil the deacon.

I. He congratulates the Emperor on his role in the triumph of the Catholic faith

By the great bounty of God's mercy the joys of the whole Catholic Church have been multiplied, now that through your clemency's holy and glorious zeal the most destructive error has been abolished among us. Our labors reached their desired end all the more swiftly because your God-fearing Majesty assisted them so faithfully and powerfully. For although the liberty of the Gospel had to be defended against certain dissenters through the power of the Holy Spirit and the agency of the Apostolic See, God's grace has shown itself even more manifestly by granting that in the victory of truth only the authors of the heresy should perish, while the Church was restored to her integrity.

The war that the enemy of our peace had stirred up was so favorably concluded -- the Lord's right hand fighting for us -- that when Christ triumphed, all His priests shared in the one victory. When the light of truth shone forth, only the shadows of error, together with their champions, were dispelled.

II. He protests against the 28th canon of Chalcedon concerning Constantinople's precedence

However, I must speak plainly to your piety about a matter that gravely concerns the ordering of the Church. The bishops assembled at Chalcedon, having dealt so admirably with the question of faith, went on to pass a resolution that troubles us deeply. By their 28th canon they have attempted to grant the see of Constantinople a rank and privilege equal to that of Rome, claiming that the city's political importance justifies ecclesiastical precedence.

This we cannot accept. The privileges of the churches were established by the holy Fathers, confirmed by the decrees of the Council of Nicaea, and cannot be overturned by any innovation. The see of Rome holds its primacy not because of the political greatness of the city but because it was founded by the blessed Peter, the prince of the Apostles, to whom the Lord entrusted the keys of the kingdom of heaven. The see of Alexandria holds its second rank because it was founded by Peter's disciple Mark. The see of Antioch holds its third rank because Peter himself first presided there.

To make ecclesiastical rank dependent on political importance is to subject the things of God to the calculations of the world. Constantinople may be the imperial residence, but that does not give its bishop authority over the ancient apostolic foundations. Ambition is not a ground for privilege, and what the Council of Nicaea established, no later assembly may lawfully amend.

I urge your clemency, therefore, to ensure that the 28th canon is not enforced, and that the proper ordering of the churches, as confirmed by the Council of Nicaea, remains undisturbed. The peace we have won for the faith should not be marred by a new contention over rank and power.

Dated from Rome.

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Revision history

  1. 2026-05-27v2.2.34-import

    Initial corpus import from New Advent / NPNF.

    Fields: letter text, metadata, source links. Source: https://www.newadvent.org/fathers/3604104.htm

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