Somewhere in the debate between every well-read Catholic and every well-read Orthodox apologist, a particular quote appears. It is deployed by the Orthodox side with evident satisfaction, because it comes not from an Orthodox theologian but from a pope — and not just any pope, but the one the Catholic Church calls “the Great” and the Orthodox Church venerates as a saint. Pope Gregory I, writing to Emperor Maurice around 595, declared: “I confidently say that whosoever calls himself, or desires to be called, Universal Priest, is in his elation the forerunner of Antichrist.” The Catholic who hears this for the first time sometimes has no ready answer. If Gregory condemned the universal bishop, what does that say about the papacy?

The answer, once you read the full correspondence, is that it says everything the Catholic has always claimed — and nothing the Orthodox apologist needs it to say. Gregory condemned the title in a particular construal directed at a specific see. He condemned it while simultaneously, in the same years, in letters to the same parties, asserting that Constantinople was “subject to the Apostolic See,” that every bishop everywhere was judicable by Rome, that no synod could bind without Roman consent, and that the care and principality of the whole Church had been committed to Peter. The man who condemned the title “universal bishop” claimed the substance of universal bishopric for Rome in language indistinguishable from Leo I.

Understanding how this is possible requires knowing what Gregory meant by the word — and that requires reading the letters he was actually writing, to the actual man he was actually opposing.

I. The Occasion — John IV and the Ecumenical Title

John IV, Patriarch of Constantinople from 582 to 595, was called “the Faster” — renowned for his ascetic discipline, venerated in both East and West for personal holiness. He was also Gregory’s personal acquaintance: Gregory had served as papal apocrisiarius (legate) in Constantinople from 578 to 585 and knew John well. Their relationship began as collegial.

The trouble started with a synod John convened in 587 or 588 to hear charges against the Patriarch of Antioch. The acts of that synod arrived in Rome with John’s signature including the title oikoumenikos patriarches — “ecumenical patriarch.” This title had been in informal use for Constantinople since at least 518. By the time of the Emperor Justinian it had entered imperial law: nine of Justinian’s Novellae used it in their subtitles, and the Codex Justinianus affirmed it explicitly. For Constantinople, the title expressed its standing as the imperial capital’s church — heir to the political status that Canon 3 of Constantinople I (381) and Canon 28 of Chalcedon (451) had translated into ecclesiastical precedence.

Gregory’s predecessor Pelagius II had already rejected the title and annulled John’s synod “on the authority of the holy apostle Peter.” Gregory inherited the dispute and initially tried private diplomacy through his apocrisiarius Sabinianus. When that failed — Sabinianus allowed John to convince Emperor Maurice the title was harmless — Gregory went public in 595 with a coordinated campaign of letters to Maurice, John himself, and the other Eastern patriarchs Eulogius of Alexandria and Anastasius of Antioch.

The letters he wrote are among the most important ecclesiological documents of the first millennium. But they must be read whole — not quarried for the condemnation while ignoring everything else.

II. What Gregory Actually Condemned — The Word That Changed Everything

Gregory’s objection was linguistic and precise. He read the Latin universalis (translating Greek oikoumenikos) as meaning unicus — sole or only. A “universal bishop” on that reading would be the one bishop, the only real bishop, from whom every other bishop’s authority derived. This is what Gregory found intolerable — not that any bishop held universal authority, but that the title implied every other bishop was merely a vicar of the one who held it.

He says this explicitly, in his first formal protest to John himself:

And to Emperor Maurice in the same year, Gregory made his argument from apostolic precedent — and in doing so revealed precisely what he thought Rome possessed:

The logic requires that Roman primacy is real for the argument to work. If Peter had no special authority, his not calling himself “universal” proves nothing. Gregory’s condemnation of the title is structurally dependent on the Catholic claim about Peter’s unique commission — and its continuation in the Roman see.

III. What Gregory Claimed for Rome in the Same Years

If the anti-title letters were all that existed, an Orthodox apologist could perhaps argue Gregory was simply being consistent — condemning both Rome’s and Constantinople’s pretensions to universal headship. But the same correspondence that condemns the title contains Gregory’s most explicit claims for Roman universal authority. The two positions coexist in the same years, the same letters, sometimes the same paragraph. Click each letter to expand the evidence.

One honest qualification before reading the dossier: Gregory’s jurisdictional assertions were not always enforceable in practice. Emperor Maurice backed John IV. Sabinianus failed repeatedly to hold Rome’s position in Constantinople. The Eastern church did not consistently govern itself as if subject to Rome’s appellate authority. Catholic apologists who present these letters as evidence of uncontested Roman governance over the East overstate their case. What the letters are evidence for is something more limited and more defensible: Gregory understood his office to include universal authority, articulated that understanding explicitly and repeatedly, and deployed it as the operative framework of his pontificate — regardless of whether every Eastern party accepted it. The question the broader series of articles on this hub has been pressing is not whether there was universal Eastern acceptance of Roman jurisdiction, but whether there was a settled Eastern consensus against it. Gregory’s letters show there was no such consensus — in the person of one of the church’s most authoritative figures, Roman jurisdictional claims were the operating assumption, whether or not they always prevailed.

These are not scattered quotations from different periods of Gregory’s pontificate, capable of being explained as early enthusiasm or late moderation. They are from the same years — 595 to 600 — as the anti-title campaign. Gregory was simultaneously condemning the title “universal bishop” and asserting the substance of universal episcopal jurisdiction for Rome. The Catholic resolution is the only resolution the texts permit: Gregory condemned a particular construal of a title (universalis = unicus, the sole bishop on whom all others depend), not the substance of universal primacy which he claimed and exercised without hesitation.

IV. The Refusal of “Universal Pope” — The Decisive Text

Orthodox apologists sometimes add a second Gregory quotation: when Patriarch Eulogius of Alexandria, having accepted Gregory’s argument, turned around and addressed Gregory himself as “universal pope,” Gregory refused that title too. Does this not prove that Gregory rejected universal episcopal authority for everyone including Rome?

Read what Gregory actually wrote to Eulogius carefully, because this letter is the most important disambiguation in the entire controversy:

The final clause is decisive: “if you call me universal pope, you deny that you are yourself what I should then be altogether.” Gregory refuses the title precisely because, in the construal he is opposing, it would mean he alone is a bishop and Eulogius is not. He is not saying “I have no universal authority.” He is saying “I refuse the title that would imply you have no real episcopal standing.” He refuses it equally for Constantinople and for Rome — not because he denies Rome’s universal headship, but because the title, in its bad sense, would absorb all episcopal dignity into one person and negate all the others.

Orthodox apologists will press the phrase “neither to me nor to any one else” — arguing this is a categorical refusal for all, not merely a refusal of one construal. The phrase deserves direct engagement. Gregory is indeed refusing the title symmetrically — but the symmetry proves the Catholic point rather than the Orthodox one. He refuses it for everyone for the same reason he refused it for John IV: because the exclusive-monopoly construal nullifies the real episcopal standing of every other bishop. The refusal is not “I have no primacy” — it is “no title should imply that any bishop’s authority comes from mine rather than from Christ.” The proof that this is the correct reading is the dozens of letters in the same corpus where Gregory claims exactly the substantive universal authority the title is supposed to name. No bishop who genuinely denied Rome’s universal primacy writes “I know not what bishop is not subject to the Apostolic See.”

The proof that Gregory is not renouncing substantive primacy is that in this same period he writes to Eulogius the most explicit assertion of Petrine primacy in his entire corpus — a letter Fordham University Orthodox scholar George Demacopoulos calls “the most pronounced assertion of Petrine authority in Gregory’s correspondence.”

V. The Apostolicity-Versus-Accommodation Argument

Once the full correspondence is in view, Gregory’s position resolves into a single consistent argument — the same argument Leo I made against Canon 28 of Chalcedon forty years earlier, and the same argument the Roman see had been making against Constantinopolitan pretensions since Canon 3 of Constantinople I in 381.

That argument is: ecclesiastical authority derives from apostolic foundation, not from imperial prestige. Rome’s primacy is real and derives from Peter. Constantinople’s attempt to claim universal status derives from being the imperial capital. These are two different bases for authority, and only one of them is legitimate.

Gregory states this contrast explicitly in his letter to Anastasius of Antioch (Norberg 5.41 / NPNF² V.43): the title “was offered at the Council of Chalcedon to the Roman Pontiffs and was refused.” Pope Leo refused it at Chalcedon, Gregory observes, because even the holder of real Petrine primacy does not grasp at titles that would imply the nullification of other bishops. The implication is sharp: if Leo, who possessed the genuine apostolic principatus, refused the title, then John IV of Constantinople — who possesses no such principatus — has no basis for claiming it at all.

The structure of Gregory’s argument therefore presupposes Roman primacy rather than refuting it. When he says “even Peter did not call himself universal apostle,” the argument only has force if Peter had the universal authority the title would name. When he says “even Leo refused the title at Chalcedon,” the argument only has force if Leo possessed what the title would signify. Gregory’s condemnation of John IV requires, at every step, that Rome holds the genuine article of which Constantinople is claiming a counterfeit.

VI. The Orthodox Argument — Stated at Its Best and Answered

VII. The Knife-Twist — Using Gregory’s Defense of Rome Against Rome

The deepest irony of the Orthodox use of Gregory is this: Gregory was defending Rome’s apostolic authority against Constantinople’s political pretension. The argument he made in 595 is structurally identical to the argument Leo I made in 452 when rejecting Canon 28 of Chalcedon, and the argument Pope Damasus made in 382 when responding to Canon 3 of Constantinople I. Each time, the Roman see distinguished between authority grounded in apostolic foundation (legitimate, Rome’s) and authority grounded in imperial prestige (illegitimate, Constantinople’s).

Orthodox apologists cite Gregory’s condemnation of Constantinople’s pretension as evidence against Rome’s apostolic authority. They are using Gregory’s defense of the apostolicity principle against Rome’s Petrine claim — which is the very thing Gregory was defending when he wrote the letters they cite. The argument refutes itself the moment you read the full correspondence.

Furthermore, consider what Gregory’s argument requires his Eastern opponents to accept. When he writes to Emperor Maurice that “even Peter did not call himself universal apostle,” he is demanding that Maurice acknowledge that Peter held the care and principality of the whole Church — and then acknowledge that John IV’s grasping for the title is an arrogant overreach against both Petrine precedent and proper episcopal collegiality. Maurice was being asked to accept Roman Petrine primacy as the premise of the argument against the Constantinopolitan title. Gregory was not concealing his ecclesiology. He was deploying it as the premise of his case.

VIII. The Aftermath — What Gregory’s Successors Did

Gregory died in 604 with the dispute unresolved. Patriarch Cyriacus retained the title. Within three years, however, Gregory’s former apocrisiarius — the man who had served as his personal representative in Constantinople and knew his mind better than anyone — became Pope Boniface III. In 607 he obtained from Emperor Phocas a decree formally recognizing the Roman pontiff as head of all churches, explicitly against the Constantinopolitan claim.

Orthodox apologists will note, correctly, that this datum has serious complications that the article must engage honestly. Phocas was a usurper who had murdered Emperor Maurice — the very Maurice to whom Gregory had written his anti-title letters — in a brutal coup. The Eastern church regarded him with contempt. His decrees carried no canonical authority in the East. Gregory’s own letter welcoming Phocas’s accession (Reg. Ep. XIV.1) is the most contested letter in the Gregorian corpus — Catholic scholars themselves have called it Gregory’s most politically compromised moment. An argument that rests primarily on the Phocas decree would be weak and should not be made.

But the Phocas decree is not the argument. It is confirmatory evidence for a reading of Gregory that stands entirely on Gregory’s own letters. The argument is this: Boniface III — Gregory’s apocrisiarius, his intimate, his institutional successor — understood Gregory to have been asserting Rome’s universal headship throughout the dispute with John IV. When Boniface moved to secure formal recognition of that headship from the new emperor, he was not inventing a new claim or misreading Gregory. He was doing what Gregory had been trying to do through diplomacy and failed. The speed of the move — within three years of Gregory’s death, by the man who knew Gregory best — is the evidence, not the moral quality of the emperor who granted it.

The Phocas complication, honestly acknowledged, does not undermine this reading. It confirms that the East had no interest in accepting Roman universal headship and would seize on any reason to reject it — including the tainted source of its formal recognition. But the Eastern rejection of the Phocas decree is exactly what the broader series of articles on this hub has been documenting: the first millennium was a period of genuine contested ecclesiology, not settled Eastern consensus against Roman primacy. Boniface III’s move, even via Phocas, is evidence that Gregory’s immediate circle understood his position as a claim to universal headship. Eastern rejection of the claim does not erase the claim. It restates the contest.

By the late seventh century, Roman pontiffs were themselves styled “ecumenical” without controversy. Gregory’s heirs drew the distinction Gregory had always made: the substance he claimed (Petrine universal headship) was genuine and worth asserting; the title in its dangerous exclusive construal remained to be reclaimed on better terms. That they eventually concluded it could safely be claimed back for Rome demonstrates they never read Gregory as having abandoned the substance — only as having refused a particular title in a particular polemical context against a particular rival who had no apostolic basis for it.