Pope Saint Agatho (678-681)

The pope who gave Rome's doctrinal word

The Monothelite crisis had begun as a political attempt at pacification. After Chalcedon, several Byzantine emperors wanted to reconcile the Chalcedonians with circles opposed to Chalcedon. The formulas of a single operation, then of a single will in Christ, seemed to offer a compromise.^[8]

Rome had refused this enforced silence. Martin I had condemned at the Lateran in 649 the Ekthesis (the imperial edict of 638, drafted by Sergius of Constantinople, which imposed confessing only one will in Christ) and the Typos (the edict of 648 by Constans II, which forbade any debate on one or two wills), then paid for this refusal with exile and death. Theodore I, Eugene I, Vitalian, Adeodatus II and Donus had held the line without being able to close the dossier. Agatho arrived at the moment when Constantine IV finally accepted that a genuine doctrinal decision was necessary.^[9][10]

This role is immense: Agatho did not personally attend the council, but his dogmatic letter gave the council its Roman axis. The Fathers of Constantinople III received the pope's report and that of the synod of 125 bishops as conforming to Chalcedon, to the Tome of Leo (the dogmatic letter addressed in 449 by Saint Leo the Great to Flavian of Constantinople, read and acclaimed at Chalcedon in 451 as the rule of the two natures of Christ) and to the Fathers.^[11]

An immediate transition after Donus

The emperor Constantine IV had written to Donus in 678 asking for the sending of representatives able to discuss with Constantinople. But Donus died before the request could bear fruit. Agatho thus inherited an initiative that did not come from him, but which he transformed into a complete ecclesial procedure.^[12][13]

This continuity matters for the series of seventh-century popes. Donus unknowingly prepared the threshold; Agatho crossed it; Leo II confirmed the acts after Agatho's death. Agatho must therefore not be isolated from his neighbours: he is the decisive voice of a Roman fidelity held for four decades.^[14][15]

A saint also recognised by the East

New Advent notes that Agatho is honoured in the Latin Church and in the Greek Church, and that he was surnamed thaumaturge on account of the miracles attributed to him.^[16] In the West, the Martyrologium Romanum inscribes his memory on 10 January, the anniversary of his death; the East commemorates him on 20 February in its calendars.^[17] This Eastern reception is not secondary. It shows that his role at Constantinople III belongs to a dogmatic heritage still common to Catholics and Orthodox: one Christ, true God and true man, in two natures, with two natural wills.

Agatho's holiness is therefore not merely a biographical devotion. It is bound to a confession of faith: preserving in Christ the fullness of the humanity assumed by the Word.

Table of witnesses

The Holy See and the official chronology

The Vatican's official entry gives Agatho as 79th pope, with the pontificate beginning on 27 June 678, ending on 10 January 681, and birth in Sicily.^[18] His title is therefore: Pope Saint Agatho (678-681).

The Liber Pontificalis gives a duration of two years, six months and four days, whereas the official reckoning (27 June 678 – 10 January 681) counts two years, six months and fourteen days: a ten-day gap.^[19] Platina, in his Lives of the Popes, gives a variant of fifteen days instead of four.^[20] Agatho died while the council was still continuing at Constantinople; he therefore never received the final acts himself. The Roman confirmation fell to Leo II.^[21][22]

The Liber Pontificalis: a later Roman notice

The Roman notice, written after the events in the seventh-century continuation of the Liber Pontificalis (Duchesne ed., vol. I), opens with a short formula: Agatho was Sicilian, sat for two years, six months and four days, and was so kind and gentle that he showed himself joyful and pleasant to all.^[23] This moral portrait matches the hagiographical tradition that made him a pope of charity.

The same notice then gives the historical core: Theodore, archbishop of Ravenna, presented himself to the Apostolic See; Agatho received the imperial order conveyed by Epiphanius, envoy of the emperors Constantine, Heraclius and Tiberius; he lost no time in organising the sending of legates to Constantinople for the unification of the holy Churches.^[24][25]

The text names the envoys: the bishops Abundantius of Paterno, John of Reggio and John of Porto; the priests Theodore and George; the deacon John; the subdeacon Constantine; a Ravennate priest named Theodore; and monks.^[26] These names give concrete value to the pontificate: Agatho did not send an abstract idea, but an identifiable Roman and Western delegation.

The Denzinger: the doctrinal centre

The French Denzinger preserves the decisive paragraphs. Before the council, Agatho's letter and the Roman synod affirm that Christ, because he is perfect God and perfect man, possesses two natural wills and two natural operations.^[27][28]

The conciliar definition of 16 September 681 explicitly received Agatho's report and that of the synod of 125 bishops. The council declared these reports conforming to Chalcedon, to the Tome of Leo and to Cyril's letters against Nestorius.^[29][30]

"We proclaim likewise in him, according to the teaching of the holy Fathers, two natural wills or willings and two natural activities, without division, without change, without partition and without confusion." — Constantinople III, definition of faith^[31]

Sicilian origin

The Holy See and the Liber Pontificalis agree on Agatho's Sicilian origin.^[32][33] New Advent specifies that he was probably born toward the end of the sixth century in Sicily, and reports the tradition that he had been a Benedictine monk at Saint Hermes in Palermo.^[34]

Caution is needed. The ancient notices do not give a complete biography. They do not allow us to reconstruct his childhood, his formation or his whole ecclesiastical career. The solid fact is his Sicilian origin, entirely consistent with seventh-century Rome: a still-Byzantine Rome, sustained by Greek, Syrian, Sicilian and Eastern presences.

An aged pope?

New Advent mentions a tradition that Agatho was over a hundred years old at his election.^[35] This detail is famous, but it should carry no more weight than the principal sources give it. The article may note it as tradition, not as absolute chronological certainty.

What matters more is the type of figure it suggests: an elderly, gentle, experienced pope, able to speak with great clarity at the decisive moment. Even if the exact age remains debated, ecclesial memory has retained Agatho as a man of spiritual maturity.

Sicily, Rome and Constantinople

Sicily was then a strategic space of the Empire. Constans II had stayed there and been assassinated at Syracuse in 668; Muslim raids and imperial tensions directly affected the island; several popes of that time had Sicilian or Greek ties.^[36][37]

Agatho thus embodied a Mediterranean papacy. His Sicilian origin is not an exotic detail: it placed him in the in-between that allowed Rome to speak to the East without ceasing to be Rome.

A letter addressed to Donus

The Liber Pontificalis reports that Agatho received a divalis iussio from the emperors, sent to his predecessor Donus, asking Rome to send priests or representatives to the imperial city for the unification of the Churches of God.^[38]

The detail matches the article on Donus: Constantine IV had first written to Donus, but the request arrived after his death. Agatho therefore did not invent the process; he accepted it, organised it and gave it genuine Western substance.^[39]

A reply that took time to consult

EWTN well summarises the delay: Agatho accepted the summons, but first gathered Rome and the West to formulate the thought of the Western bishops. Other assemblies were held elsewhere, and these discussions occupied the West until 680.^[40]

This delay was not bureaucratic slowness. It manifested a Catholic method: Rome answered the emperor, but did not reduce the faith of the West to a mere personal opinion of the pope. Agatho's letter was accompanied by a synodal letter subscribed by 125 bishops.^[41]

The Roman legates

The Liber Pontificalis names the principal legates: three bishops, two priests, a deacon, a subdeacon, a Ravennate priest and monks.^[42] EWTN speaks of eleven representatives finally arriving at Constantinople in September 680.^[43]

The composition is significant. There were Italian bishops, Roman clerics, a Ravennate element, monks. The delegation carried a concrete Western Church, not a mere isolated letter.

Archbishop Theodore presents himself

The Liber Pontificalis notes that in Agatho's time, Theodore, archbishop of Ravenna, presented himself to the Apostolic See after many years.^[44]

This fact continues the dossier already opened under Vitalian and Donus. Ravenna, seat of the Byzantine exarch, had obtained a claim of autocephaly under Constans II. Under Donus, the Roman source spoke of Ravenna's return to its ancient Apostolic See; under Agatho, the Ravennate archbishop came concretely to Rome.^[45][46]

A return more juridical than spectacular

The passage should not be dramatised as if the whole affair had been settled in a day. The neighbouring articles have already shown that the exit from Ravennate autocephaly was gradual, with tensions between the Roman account and Ravennate traditions.^[47]

But Agatho did represent a visible step: Archbishop Theodore presented himself at Rome. In a still-Byzantine Italy, this gesture meant that Roman jurisdiction regained a weight that imperial support for Ravenna had sought to limit.

Ravenna in the conciliar delegation

The presence of a Ravennate priest named Theodore among Agatho's envoys to Constantinople is notable.^[48] It manifests a reconciliation placed at the service of the council. Ravenna was no longer merely the seat of a Roman contestation; it became associated with the Catholic confession carried toward the East.

An English case brought to Rome

Shortly after Agatho's election, Saint Wilfrid, bishop of York, arrived at Rome to contest his deposition and the division of his diocese by Theodore of Canterbury.^[49] The affair is not anecdotal. It shows that the English Church, which had emerged from Whitby and been organised by Theodore of Tarsus, recognised Rome as a court of appeal in an episcopal crisis.

New Advent summarises that the pope convened a synod at the Lateran to examine the dossier and that Wilfrid was restored to his see.^[50] Britannica specifies that the judgment recognised the injustice of the deprivation and ordered his restoration.^[51]

A Roman judgment, not micromanagement

The Wilfrid dossier must be presented with balance. Rome did not necessarily deny that the vast territory of northern England could be divided; the problem was the manner in which Wilfrid had been set aside and the question of canonical regularity.^[52]

Agatho thus appears as a judge of appeal: he did not govern England day to day, but he received a case, gathered a synod, examined the facts and rendered judgment. In the history of the English Church, this is an important moment of recourse to the Apostolic See.

An echo of the Roman mission to England

The Wilfrid question prolonged the mission launched by Gregory the Great, organised by Augustine of Canterbury, then relaunched in the seventh century by Vitalian with Theodore of Tarsus and Hadrian.^[53][54]

Agatho therefore inherited an England mature enough to produce its own canonical conflicts. The sign is paradoxically positive: a young Church, when it seeks Rome to settle a crisis, shows that it is no longer a mere floating mission territory, but a Church inserted into Catholic communion.

A dogmatic letter, not a diplomatic compromise

Agatho's letter to Constantine IV did not seek a vague formula. It affirmed that Christ is perfect God and perfect man; that will and operation belong to nature; and that, since there are two natures in the one person of Christ, two natural wills and two natural operations must be confessed.^[55][56]

This precision answered exactly the weakness of Monothelitism. The problem was not multiplying subjects in Christ. The problem was not mutilating his humanity. If the Word did not assume a human will, he did not fully assume what he came to heal.

"For if anyone understood will as personal, then, since we speak of three persons in the Holy Trinity, one would also have to speak of three personal wills." — Agatho and the Roman synod, argument against confusing person and nature^[57]

The synod of 125 bishops

The Council of Constantinople III also received the synodal report sent under Agatho by the synod of 125 bishops: Agatho spoke as pope, but also by mobilising the Western confession, which corrects an overly solitary image of the papacy.^[58]

New Advent stresses that the legates brought to Constantinople a long dogmatic letter from the pope and a letter of the same import from the Roman synod of spring 680.^[59]

Continuity with Leo the Great

The final definition of Constantinople III placed Agatho's letter in continuity with the Tome of Leo at Chalcedon.^[60] The comparison is strong: just as Leo had given the decisive formula against confusing or separating the natures, Agatho gave the decisive formula against suppressing the human will of Christ.

Opening and sessions

The council opened on 7 November 680 in the Trullus hall of the imperial palace. New Advent indicates that about 100 bishops took part at the start, then 174 at the end, and that the three pontifical legates presided over the assembly.^[61]

EWTN specifies that the pope's representatives arrived at Constantinople in September 680, that the sessions lasted until 16 September 681, and that Agatho's dogmatic letter was read and accepted by the bishops.^[62]

The letter received as Peter's confession

The acts published by New Advent preserve the council's letter to Agatho. In it the Fathers hailed the pope as bishop of the first see of the universal Church and recognised that his letter had supplied the true confession by which heresy was driven out.^[63]

"We recognise that this letter was written as by the Prince of the Apostles; through it we have driven out the heretical sect of many errors." — Constantinople III, letter of the council to Agatho^[64]

This formula must be read correctly. It does not turn every pontifical act into an automatic oracle; the case of Honorius, condemned in the same council, forbids it. But it shows that, in this precise dossier, the Church received Agatho's Roman confession as the orthodox rule.

Macarius of Antioch and Monothelite resistance

The Liber Pontificalis vividly recounts the sessions in which books and dossiers were examined. The adversaries produced texts; the legates demanded examination; falsified additions were discovered; Macarius of Antioch was confounded and persisted in his error.^[65]

The council finally condemned the promoters of Monothelitism: Theodore of Pharan, Sergius, Cyrus of Alexandria, Pyrrhus, Paul, Peter of Constantinople, Macarius of Antioch, Stephen his disciple, and also Honorius for his letters to Sergius.^[66][67]

The final definition

On 16 September 681, the council defined that Christ possesses two natural wills and two natural activities, without division, without change, without partition and without confusion. His human will did not resist his divine will; it followed it and submitted to it.^[68]

This definition is not a technical detail. It protects the truth of Gethsemane. When Christ said: "not my will, but yours", he spoke with a true human will, perfectly holy, freely united to the Father.^[69]

The same council received Agatho and condemned Honorius

Constantinople III is sometimes invoked against the papacy because of the condemnation of Honorius. The fact must be stated without embarrassment: the council rejected the letters of Honorius to Sergius and struck him with anathema, because he had favoured or confirmed the impious doctrines of Sergius.^[70][71]

But the same council received Agatho's letter as orthodox confession. This contrast is instructive: the same council received Agatho's confession and anathematised the letters of Honorius to Sergius. It recognised a grave fault in Honorius, and it received in Agatho the doctrinal formulation that made it possible to repair that fault.

What Agatho corrected

Honorius had sought peace through silence and through an inadequate formula. Agatho, by contrast, spoke. He did not content himself with saying that there should be no quarrelling; he affirmed the decisive distinction between natural will and person. This distinction closed the door to the Monothelite compromise.^[72][73]

The spiritual lesson is direct: a doctrinal error is not healed by ambiguity. In certain dossiers, pastoral charity demands naming the truth exactly.

Leo II confirmed after Agatho

Agatho died before the end of the council. His successor Leo II confirmed the decisions, received the definition of faith and also confirmed the condemnation of Honorius, stressing his failure in apostolic teaching.^[74]

The doctrinal victory therefore bears three Roman names: Agatho prepared and spoke; the council defined; Leo II confirmed. Catholic authority is not an isolated gesture, but an ordered reception.

The pontifical confirmation tax

Treccani reports that Agatho apparently obtained a reduction of the sum Rome had to pay for the confirmation of a new pope.^[75] Britannica speaks more strongly of an abolition of the tax formerly required at the consecration of a new pope, which improved relations between Rome and Constantinople.^[76]

The Latin text of the Liber Pontificalis supports reduction rather than abolition: the sum usually paid for the ordination of a new pope was lightened (relevata est quantitas), while the imperial procedure remained required — no elect was to be ordained before the general decree had reached the imperial city.^[77] This passage does not definitively close the dossier between reduction and abolition. The papacy thus remained caught within the Byzantine imperial framework, but ties relaxed at the very moment when doctrinal communion was being rebuilt.

The arcarius of the Roman Church

The Liber Pontificalis notes that Agatho increased the honours due to the various orders of the clergy and that he personally settled a dossier of the arcarius, that is, of the financial management of the Roman Church, before instituting a responsible officer according to custom when he was detained by illness.^[78]

This detail is dry, but precious. The pope of the great council was not only a theologian at a distance; he also governed finances, the orders of the clergy, discipline and the Roman household.

The eclipse and the Roman mortality

The Roman notice mentions an eclipse of the moon on 18 June 680 (eighth indiction), then a very grave mortality at Rome from June to September, such that parents with children, brothers and sisters were led two by two toward the graves.^[79]

Britannica also notes that Agatho died during a plague ravaging Rome.^[80] The image is striking: while his legates carried the Roman word to Constantinople, the city of Peter went through a terrible mortality. The Church defined the truth of Christ amid very concrete fragility.

Death during the council

Agatho died at Rome on 10 January 681, before the conclusion of the council on 16 September of the same year.^[81][82] He was buried at Saint Peter's.^[83]

The Liber Pontificalis also gives his ordinations: in a single ordination, ten priests, three deacons and eighteen bishops for various places.^[84] Even a brief pontificate thus continued to provide for the Churches.

The council's letter to Agatho

The council's letter to Agatho, sent when he was already dead or about to be replaced in the Roman reception, insisted on his role as physician of orthodoxy. The Fathers asked for the Roman confirmation of the acts, according to the traditional order.^[85]

This request passed concretely through Leo II. Agatho is therefore the pope of the initial word, not of the final reception.

The thaumaturge

New Advent reports that Agatho was called Thaumaturgus, or wonderworker, on account of the many miracles attributed to him.^[86] Detailed accounts of these miracles are not attested by the sources used here; it remains that the Church did not receive Agatho only as administrator or doctrinalist, but as a saint.

The true humanity of Christ

Agatho's heritage lies first in a simple and profound truth: Jesus did not save man by pretending to have a human will. He assumed a complete humanity, with a reasonable soul, a human will, a human obedience and a human freedom perfectly united to the divine will.^[87][88]

This doctrine protects spiritual life. If union with God abolished the human will, holiness would be absorption. Constantinople III teaches the opposite: the more the human will is united to God, the more it is healed, free and fully itself.

Truth spoken at the right moment

Agatho corrected by his word the defect of silence that had marked Honorius. He did not shout to divide; he spoke to unite in truth. His letter shows that lasting ecclesial peace is not born of a vague formula, but of a clear confession.

"Woe to me if I cover over with silence the truth which I am bidden to give to the exchangers, that is, to teach to the Christian people and to imbue them with it." — Agatho, letter to Constantine IV, read in the acts of Constantinople III^[89]

The pope of continuity

Agatho did not fall from the sky. He received the heritage of Martin I, Maximus the Confessor, Theodore I, Eugene I, Vitalian, Adeodatus II and Donus. He then passed on to Leo II a work unfinished, but doctrinally launched.^[90][91][92]

His pontificate shows how the Church advances: through martyrs, prudent popes, synods, letters, legates, corrections, confirmations. Agatho is the moment when this long fidelity became an ecumenical definition.

• Pope Donus — immediate predecessor, initial recipient of the imperial request of 678.
• Council of Constantinople III (680-681) — definition of the two wills and two operations of Christ.
• Pope Honorius I — major doctrinal contrast in the same Monothelite dossier.
• Pope Saint Martin I — Roman martyr of resistance to the imperial Typos.
• Pope Saint Leo II — successor of Agatho and confirmer of the conciliar acts.
• Pope Saint Vitalian — pope of the prudent detente with Constantinople and of the Ravennate dossier.
• The conversion of the Anglo-Saxons — context of Wilfrid, Theodore of Tarsus and the appeal to Rome.