The Early Church and Peter's Primacy

Letter LXVI, from Pope Leo to the Bishops of the Province of Arles

Synopsis: Leo responds to the petition of the comprovincial bishops of Arles by interposing his sentence over the ancient controversy between the churches of Arles and Vienne — assigning each its limits: the Viennensis bishop shall preside over four neighboring cities with Vienne as fifth, while the remaining cities of the province shall remain under the authority and ordination of the Arelatensian bishop, in whose moderation Leo trusts that he will not consider lost what is granted to his brother.

Leo, pope, to his most beloved brothers: Constantinus, Armentarius, Audientius, Severianus, Valerianus, Ursus, Stephanus, Nectarius, Constantius, Maximus, Asclepius, Theodorus, Justus Ingenuus, Augustalis, Superventor, Ynantius, Fonteius, Palladius.

Chapter I: Both Petitions Heard; Justice Must Preserve the Privileges of Both Churches

From reading the letters of your beloved, delivered by our sons the presbyter Petronius and the deacon Regulus, we clearly recognized the benevolent affection you extend to our brother and fellow bishop Ravennius — requesting that what his predecessor lost through excessive presumption be restored to him. But the bishop of Vienne, through letters and legates, had anticipated your brotherhood’s petition with his own complaint: that the bishop of Arles had usurped for himself the ordination of the bishop of Vaison. Since therefore both the reverence of the paternal canons and the favor of all of you must be preserved by us — so that in the privileges of the churches nothing may be overturned, nothing may we allow to be cut away — it followed that, in order to preserve peace within the Viennensis province, the moderation of justice should be applied: which would neglect neither the use of antiquity nor your desires.

Chapter II: Leo’s Sentence — Vienne Receives Five Cities; Arles Holds Authority Over the Remaining Province

Having considered the allegations of both parties’ present clerics, we find that both the Viennensis and Arelatensian cities have always been distinguished within your province — at times by one excelling in ecclesiastical privileges, at times the other, for various reasons, though they once shared common rights derived from their peoples. We therefore do not tolerate that the city of Vienne be entirely dishonored with respect to ecclesiastical justice — especially since it already benefits from our dispositive authority in the reception of its privilege.

The power taken from Bishop Hilary we have judged should be assigned to the Viennensis bishop. So that he not appear suddenly diminished, he shall preside over four neighboring cities — Valence, Tarantaise, Geneva, and Grenoble — with Vienne itself as the fifth, so that the solicitude of all those forenamed churches pertains to its bishop.

The remaining cities of the same province shall remain under the authority and ordination of the Arelatensian bishop — whom we trust, in the moderation of his temperance, to be so devoted to charity and peace that he will by no means consider lost what he sees granted to his brother.

Given on the third day before the Nones of May, in the seventh consulship of Valentinian Augustus and in the consulship of Avienus, most illustrious men.

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Notes / Historical Commentary

Letter LXVI is Leo’s formal judicial response to the petition of Letter LXV — a binding sentence resolving the ancient dispute between the metropolitan churches of Arles and Vienne. Its form is worth observing: Leo hears both parties (the Arelatensian bishops who petitioned him in Letter LXV, and the Viennensis bishop who counter-petitioned), weighs their allegations through the representatives present in Rome, and delivers a ruling that assigns each church its territorial limits. This is the Apostolic See functioning as a standing court of jurisdiction over the Gallic church — not merely a court of appeal after other remedies are exhausted, but the natural venue to which disputed questions of metropolitan privilege are brought for definitive resolution.

The use of non patimur in Chapter II is significant and worth the reader’s attention. “We do not tolerate that the city of Vienne be entirely dishonored” employs the same jurisdiction formula that appears in Letter IX (“We do not permit that we should differ in any point”) and Letter XXVII. It is the language of a governing authority declaring what will not be allowed to stand. Notably, Leo deploys it here in favor of the counter-petitioner — Vienne, not Arles. The comprovincial bishops had petitioned for Arles’s full restoration; Leo’s sentence is more nuanced, giving Arles the bulk of the province while assigning Vienne a defined territorial bloc. The formula shows that Leo’s judicial role is not simply to ratify what petitioners request but to render justice to both parties — which is precisely what a court does, as distinct from an administrative bureau.

The ruling’s structure confirms the jurisdictional principle that runs throughout the Gallic correspondence since Letter X. Arles’s authority over the broader Gallic churches is confirmed, but it is confirmed explicitly as held under the Apostolic See’s dispositive authority — a delegation that Rome both grants and limits. The power assigned to the Viennensis bishop is explicitly described as “the power taken from Bishop Hilary” — the power Leo stripped in Letter X and now redistributes by his own sentence. What Leo took, Leo gives; what he gives, he defines. The Arelatensian claim and the Viennensis claim both derive their final validity from the same source. This is not a merely honorific primacy; it is the exercise of a governing jurisdiction that constitutes the metropolitan structure of the Gallic church.

The Symmachus note appended in the Arles and Vallicella manuscript tradition — recording that Leo’s sentence was reconfirmed by the Apostolic See under Pope Symmachus in 489, nearly forty years after it was issued — is itself a piece of evidence. Leo’s ruling was still the operative jurisdictional instrument governing the Gallic church six decades later, still requiring apostolic reaffirmation when its terms were again contested. The continuity of authority across popes, and the ongoing force of a sentence issued by one pope and reconfirmed by another, is exactly the institutional pattern that Leo’s own letters describe in theological terms: the Apostolic See’s authority is not personal to its current occupant but inheres in the office that Peter founded and his successors hold.

The Early Church and Peter's Primacy