Pope Honorius I governed the Church of Rome from 27 October 625 to 12 October 638. The Holy See presents him as the 70th pope of the Catholic Church, a native of Campania, successor of Boniface V and predecessor of Severinus.[1]
His pontificate is one of the most contrasted of the seventh century. On the one hand, the Liber Pontificalis remembers an energetic pope, a former of the clergy, a great restorer of Roman sanctuaries, builder of Saint Agnes Outside the Walls and Saint Pancras, protector of the patrimony of Saint Peter, and a supporter of the English mission.[2] On the other hand, his name remains tied to the gravest historical controversy raised against the papacy: his letters to Patriarch Sergius of Constantinople were judged ambiguous in the Monothelite crisis — the doctrine of a single will in Christ — and were condemned after his death by the Third Council of Constantinople.[3]
This article must therefore avoid two opposite errors. Honorius must not be reduced to "a heretical pope", as if his pontificate had been nothing but a footnote to a polemic. But neither must the conciliar condemnation be erased, nor diluted in too easy a defence. The serious Catholic position holds both facts together: Honorius truly failed in a grave doctrinal dossier; that failure does not correspond to an ex cathedra definition engaging the pontifical infallibility as Vatican I would later define it.[4][5]
"Woe is me, if I cover over with silence the truth which I am bidden to give to the exchangers, i.e., to teach to the Christian people and imbue it therewith." — Agatho, letter read at Constantinople III, against the temptation of hiding the truth through silence[6]
Why does Honorius I matter?
A seemingly secondary pope, but not in history
The Honorius dossier is far from thin. It touches four major realities: monumental Rome, the Anglo-Saxon mission, the discipline of liturgical unity, and the Christological crisis that would lead to the definition of the two natural wills of Christ.[7][8][9][10]
In continuity with Deusdedit and Boniface V, the notice that the Liber Pontificalis devotes to Honorius takes on a very concrete scope: works at Saint Peter, the basilica of Saint Agnes, foundations of sanctuaries, gifts of silver, weekly processions, numerous ordinations. The papacy is not only a doctrinal authority: it administers places, forms a clergy, maintains the tombs of the martyrs and shapes the urban memory of Rome.[11][12][13]
The immediate successor of Boniface V
Boniface V dies in October 625. Honorius is consecrated on 27 October 625 according to Duchesne (Jaffe and Mann give 3 November), without the long vacancy that had preceded Boniface.[14][15][16] Treccani expressly notes that he was consecrated in 625 "without the confirmation of Emperor Heraclius".[17] Read in the light of the Boniface V dossier — the pontifical confirmation henceforth entrusted to the exarch — this can be seen as a sign that this reform is beginning to bear fruit.[18]
This swiftness matters. After the delays of 604-619, the succession of 625 gives Rome a more stable continuity. Honorius inherits a papacy that is still Byzantine, but less paralysed by the delays of Constantinople.
The test case of pontifical infallibility
The Honorius case becomes, especially in the nineteenth century, a central argument in the debates on infallibility. The question is simple: if a pope was condemned by an ecumenical council, is the doctrine of Vatican I destroyed? The classic Catholic answer is no, but it must be precise.[19]
Vatican I does not say that every pope is impeccable, inspired in his private letters, infallible in every disciplinary formula, or protected against all negligence. It defines a divine assistance in a very determined act: when the Roman Pontiff speaks ex cathedra, as pastor and doctor of all Christians, in defining a doctrine of faith or morals to be held by the universal Church.[20]
Honorius did not do that. He answered Sergius in a private correspondence, seeking to calm a dispute over vocabulary, but with a formula that served error instead of extinguishing it.[21][22]
The principal sources
Table of witnesses
| Source | Date | What it contributes | Caution |
|---|---|---|---|
| Holy See | current notice | 70th pope, dates 27.X.625 - 12.X.638, Campanian origin | Very brief |
| Liber Pontificalis | Roman tradition | Origin, father Petronius, formation of the clergy, restorations, sanctuaries, ordinations, burial | Very favourable; does not treat the doctrinal crisis in detail |
| Bede the Venerable | early 8th century | Letters and pallia sent to Paulinus of York and Honorius of Canterbury; letter to the Scots on Easter and Pelagius | English source, mission-oriented |
| Letters to Sergius | 633-634 | Core of the Monothelite controversy | Two letters according to Treccani (633 and 634); Chapman dates the question raised by Sergius to about 634 |
| Constantinople III | 680-681 | Definition of the two wills of Christ; posthumous condemnation of Honorius | Ecumenical council, Roman reception by Leo II |
| Leo II | 682-683 | Roman confirmation of Constantinople III and qualification of the fault of Honorius | Distinguishes doctrinal negligence from the definitional act |
| New Advent / Catholic Encyclopedia | 1910 | Detailed dossier on the "Honorius question" and Vatican I | Old but Catholic and very well documented source |
| Treccani | modern notice | Synthesis: Campanian nobleman, mission, patrimony, letters to Sergius, condemnation | Short notice |
The Holy See and the official chronology
The current Vatican entry gives Honorius I as the 70th pope, with the pontificate beginning on 27 October 625, ending on 12 October 638, and birth in Campania.[23] The Liber Pontificalis gives a pontificate of twelve years, eleven months and seventeen days, which corresponds to the order of magnitude of the official chronology.[24]
His successor is not consecrated immediately. Severinus will have to wait for imperial confirmation, in a climate made very difficult by the Monothelite controversy and by tensions with Constantinople.[25] The swiftness of 625 therefore does not definitively remove Byzantine dependence; it marks only a relative improvement.
The Liber Pontificalis: Honorius the builder
The pontifical notice begins with two traits: Honorius is Campanian, son of the consul Petronius, and he "did much good" in his time.[26] It then insists on a point rarely placed in the foreground by modern polemics: he instructed the clergy.
"Hic temporibus suis multa bona fecit. Hic erudivit clerum." — Liber Pontificalis, notice on Honorius I[27]
What follows is almost a building-site inventory: silver for the confession of Saint Peter, the great entrance doors of the basilica clad in silver, great silver chandeliers, restoration of the roof of Saint Peter with bronze tiles taken, with the agreement of Heraclius, from an ancient monument of Rome; construction of Saint Agnes Outside the Walls; Saint Apollinaris near Saint Peter; Saint Cyriacus on the Ostian Way; Santi Quattro Coronati; Saint Severinus near Tivoli; the cemetery of Saints Marcellinus and Peter; Saint Pancras on the Aurelian Way; Saint Lucy; Saint Hadrian; the monastery of Saints Andrew and Bartholomew near the Lateran.[28]
Bede: the pope of the English mission
Bede preserves several acts of Honorius toward the Anglo-Saxon Church. In 634, he sends the pallium to Paulinus, the missionary bishop linked to the conversion of Northumbria, and writes to King Edwin to encourage him to persevere in the faith.[29] He also sends the pallium to Honorius of Canterbury, successor of Justus, with a practical provision: when one of the two metropolitans, Canterbury or York, dies, the other may consecrate his successor, so as to avoid the delays caused by the distance from Rome.[30]
This detail is typical of the missionary papacy. Rome does not govern England by micromanagement. It gives signs of communion, settles concrete problems of distance, and protects episcopal continuity.
Constantinople III: the posthumous judgment
The Third Council of Constantinople opens in 680, more than forty years after the death of Honorius. It receives the dogmatic letter of Agatho, condemns Monothelitism, and defines that Christ possesses two natural wills and two natural operations, divine and human, without opposition or division.[31]
In its thirteenth session, the council also examines the letters of Sergius to Honorius and of Honorius to Sergius, rejects them as foreign to the apostolic dogmas, then pronounces anathema against Honorius together with the Monothelite leaders.[32] This is the hard fact of the dossier; it must be quoted, not circumvented.
Before the pontificate: a Campanian in Byzantine Rome
Origin and family background
The Liber Pontificalis calls Honorius Campanian, son of Petronius the consul.[33] Campania does not necessarily designate the modern administrative region; in the pontifical notices, it can cover a wider area around Rome and southern Latium. The Vatican simply retains "Campania" as birthplace.[34]
The mention of a consul father points to a high milieu. Treccani calls him a Campanian nobleman.[35] No detailed biography should be deduced from this beyond what the sources give, but it helps to understand the profile of the pope: Honorius knows the language of administration, of patrimonies, of building sites, and of relations with the Empire.
A papacy still in the orbit of Heraclius
Honorius is consecrated under Emperor Heraclius. The latter has just crossed an immense crisis: war against the Persians, recovery of the True Cross, weakening of the eastern provinces, then the Islamic irruption at the end of the reign.[36] Rome remains within the Byzantine imperial space, even if Italy lives with the exarch of Ravenna, the Lombards and a growing distance from Constantinople.
This dependence explains several dossiers of the pontificate: the recovery of ancient materials with imperial permission, relations with Patriarch Sergius, the reception of the religious policy of Heraclius, and the tension that will erupt after Honorius around Severinus and Monothelitism.[37][38]
The pope who forms his clergy
The Liber Pontificalis says briefly: "he instructed the clergy".[39] This sentence deserves to be taken seriously. In the neighbouring articles, Deusdedit and Boniface V already appear as popes attentive to the Roman clergy. Honorius continues this line, but with a more active dimension: forming, organising, embellishing the places where the clergy celebrates, singing the litanies, linking the sanctuaries by processions.[40][41]
A pontificate therefore cannot be summed up in an unfortunate correspondence. Before being the name of an objection, Honorius is a bishop of Rome who governs a city, a clergy and a network of sanctuaries.
Monumental Rome: Saint Peter, Saint Agnes and the martyrs
The confession of Saint Peter
Honorius restores and enriches the basilica of Saint Peter. The Liber Pontificalis says that he renewed the furnishing of Saint Peter, clad the confession of the apostle in pure silver, had the great entrance doors of the church clad in silver, gave great silver chandeliers and a silver table for Saint Andrew.[42]
These details are not worldly decoration. In seventh-century Rome, the confession of Peter is the visible heart of apostolic authority. Clothing the tomb, lighting it, honouring the entrance of the basilica, means telling the people that the Church of Rome lives around the martyrdom of Peter.
The bronze tiles and ancient memory
The notice also states that Honorius roofed Saint Peter with bronze tiles taken from a temple of Rome, with the authorisation of Heraclius.[43] The gesture is laden with meaning. The materials of a pagan or imperial monument are redirected toward the apostolic basilica. Old Rome serves Christian Rome.
Saint Agnes Outside the Walls
The most important building site is Saint Agnes Outside the Walls, on the Via Nomentana, at the third mile from Rome. The Liber Pontificalis says that Honorius built it "from the ground" near the place where the martyr rests, that he adorned her tomb with silver, placed above it a ciborium of gilded bronze, gave gold vessels and made the apse in mosaic.[44]
The basilica still preserves today a famous apse mosaic in which Saint Agnes stands in imperial dress, surrounded by donor popes, including Honorius. For this article, it is the most important historical image: it shows the pope as builder, but under the sign of a young Roman martyr.
"He made the apse of this basilica in mosaic." — Liber Pontificalis, on Saint Agnes Outside the Walls[45]
A network of martyrial sanctuaries
Honorius does not stop at Saint Agnes. The notice names Saint Apollinaris in the portico of Saint Peter, Saint Cyriacus on the Ostian Way, Santi Quattro Coronati, Saint Severinus near Tibur, the cemetery of Saints Marcellinus and Peter on the Via Labicana, Saint Pancras on the Aurelian Way, Saint Lucy near Saint Sylvester, Saint Hadrian, and a monastery of Saints Andrew and Bartholomew near the Lateran.[46]
| Place | Type of work | Ecclesial meaning |
|---|---|---|
| Saint Peter | Silver, doors, chandeliers, roof | Apostolic centre |
| Saint Agnes | Basilica, tomb, ciborium, mosaic | Memory of the virgin martyrs |
| Saint Pancras | Basilica, tomb, ciborium, arches, chandeliers | Adolescent martyr of the Aurelian Way |
| Santi Quattro Coronati | Church dedicated and endowed | Memory of the artisan/soldier martyrs |
| Saint Apollinaris | Basilica near Saint Peter | Weekly procession toward the apostle |
| Saints Andrew and Bartholomew | Monastery near the Lateran | Regular life at the pontifical heart |
The Saturday procession
Honorius also establishes that a litany should set out every Saturday from Saint Apollinaris toward Saint Peter, with hymns and canticles, and that all the people should hasten to it.[47] The detail is precious: it shows a Christian Rome in motion, where the liturgy links the holy places and forms the people by walking, singing and the memory of the apostles.
This procession echoes the liturgical concern already visible in Deusdedit and Boniface V. The ancient Church does not teach only by texts; it also teaches by the calendar, sacred topography, stations, litanies and chant.
Honorius and Christian England
Paulinus, York and Northumbria
Bede reports that Honorius, learning of the conversion of the Northumbrians with King Edwin through the preaching of Paulinus, sends the pallium to Paulinus and a letter of exhortation to the king.[48] The pallium is not a mere ornament: it signifies a metropolitan mission, an ecclesial responsibility and communion with the Roman See.
England is still at that time a recent mission land. Gregory the Great sent Augustine in 597; Boniface V supported Justus, Edwin and Aethelburh; Honorius accompanies the next stage, that of lasting organisation between Canterbury, York and the Anglo-Saxon kingdoms.[49][50][51]
Honorius of Canterbury
After the death of Justus, Honorius of Canterbury is consecrated by Paulinus at Lincoln. Bede specifies that Pope Honorius also sends him the pallium and repeats the same provision: when one of the metropolitans dies, the other may consecrate his successor.[52]
The reason given is very concrete: the provinces are vast and far from Rome. Pontifical authority shows itself here supple and missionary. It does not claim to make each succession dependent on a long Italian journey; it gives a rule so that the local Church will not be paralysed.
Bede reports that, in his letter to King Edwin, Honorius writes that he has sent two pallia to the two metropolitans, Honorius and Paulinus (text of the Fordham edition: "We have sent two pails to the two metropolitans, Honorius and Paulinus" — "pails" being a misprint for "palls" in that edition).[53]
Easter, the Scots and Pelagius
Bede further says that Honorius wrote to the Scots about the observance of Easter and the Pelagian heresy.[54] This is no folkloric detail. The computation of Easter is, in Christian antiquity, a sign of unity with the universal Church. The question had already set Augustine of Canterbury against British bishops; it would return until the synod of Whitby in 664.
Honorius thus stands in the Roman line: Catholic unity is not only doctrinal in the abstract sense, but liturgical, paschal, concrete. Celebrating the Resurrection with the universal Church manifests a real communion.
The Monothelite crisis
From Chalcedon to Monothelitism
The Council of Chalcedon had confessed Christ in two natures, without confusion or division. In the seventh century, the Monophysite or Miaphysite crisis — those who confess only one nature in Christ, against Chalcedon — is not closed in the imperial East. To attempt a formula of union, some propose speaking of a single "energy" or a single "will" in Christ.[55]
The political intention is understandable: reconciling divided provinces, stabilising the Empire, preventing Chalcedonian language from being perceived as dividing Christ. But the solution is dangerous. If Christ has no true human will, his humanity is not complete; and if his humanity is not complete, our salvation is struck at its centre.
Sergius writes to Honorius
Patriarch Sergius of Constantinople writes to Honorius to set out the difficulty. He claims to want to avoid conflictual expressions, notably "one operation" or "two operations", but the dossier slides toward the question of a single will.[56]
Honorius answers with a peacemaking intention: to avoid disputing over terms that might scandalise the simple. But his letter contains the most problematic formula of the dossier, when he speaks of a single will of Christ, probably to exclude the idea of two opposed wills.[57]
The problem is there: to say that Christ has no two contrary wills is true; to say without precision that he has "one single will" becomes false or at least dangerously equivocal in the context of the debate. An imprecise pastoral formula, in a doctrinal crisis, can produce disaster.
Silence as false peace
The fault of Honorius is not only an unhappy expression. It is a method: instead of clarifying the faith, he advises silencing a terminological controversy. In some cases, silence calms; in a Christological dossier where a nascent heresy is seeking precisely an official formula, silence can become material complicity.
The letter of Agatho to Constantinople III will give the inverse spiritual key: a pastor must not hide the truth entrusted to him.[58] The Church will learn from this contrast. Faced with an error touching the Incarnation, peace cannot be bought by ambiguity.
"Woe is me, if I cover over with silence the truth which I am bidden to give to the exchangers, i.e., to teach to the Christian people and imbue it therewith." — Agatho, letter to the emperor, read at Constantinople III[59]
What the council will define
Constantinople III proclaims that Christ has two natural wills and two natural operations, divine and human, without opposition. His human will follows the divine will; it is not suppressed by the union with the Word.[60]
This definition protects two truths at once. Christ is one single divine person, not two subjects. But he is also true man, endowed with a human soul, a human intellect and a human will. Gethsemane then becomes a capital text: "not my will, but thine" reveals no sinful opposition, but the perfect obedience of a fully assumed human will.[61]
| Question | Catholic answer |
|---|---|
| Is Christ one or two persons? | One single divine person, the incarnate Word |
| Does he have a true human nature? | Yes, complete, with a rational soul |
| Does he have a human will? | Yes, otherwise the assumed humanity would be mutilated |
| Does this human will oppose God? | No, it freely follows the divine will |
| Why is Honorius implicated? | Because his formula favoured confusion instead of correcting it |
The condemnation of Honorius
The thirteenth session of Constantinople III
On 28 March 681, in the thirteenth session, the Fathers of the council re-examine the letters of Sergius and Honorius. They declare these documents foreign to the apostolic dogmas and the Fathers, reject them, then define that Honorius must be expelled from the holy Church of God and anathematised with the other names of the dossier.[62]
"We define that there shall be expelled from the holy Church of God and anathematized Honorius who was some time Pope of Old Rome, because of what we found written by him to Sergius, that in all respects he followed his view and confirmed his impious doctrines." — Constantinople III, Session XIII[63]
The sentence is harsh. It explains why the affair became a polemical weapon. It also obliges Catholics to total honesty: the Church has received a council that condemned a deceased pope. The Catholic defence does not consist in denying this fact.
Leo II confirms, but specifies the fault
Pope Leo II gives in 682-683 the Roman confirmation of the council, by which Rome receives it among the ecumenical councils. There he writes that Honorius "did not attempt to sanctify this Apostolic Church with the teaching of Apostolic tradition, but by profane treachery permitted its purity to be polluted".[64][65] To the Spanish bishops, he specifies the meaning of this fault: Honorius "did not, as became the Apostolic authority, extinguish the flame of heretical teaching in its first beginning, but fostered it by his negligence".[66]
This precision does not whitewash Honorius. It even aggravates the pastoral responsibility: a pope can sin gravely through lack of doctrinal vigilance. But it locates the fault in the right place: he did not solemnly define heresy for the universal Church; he let a dangerous formula serve an error.
Why this does not destroy Vatican I
Pontifical infallibility does not cover all the words of a pope. It is not a permanent inspiration. It does not turn every letter, audience, conversation, prudential decision or private answer into dogma. It protects the Church when the pope defines, as universal pastor, a doctrine of faith or morals to be held by all.[67]
Honorius promulgated no symbol of faith, did not summon the universal Church to hold Monothelitism, did not exercise the definitional act that Vatican I targets. His case shows on the contrary why the definition of Vatican I is strictly framed. It canonises neither imprudence, nor private letters, nor guilty silences.[68][69]
What the affair teaches the Church
The Honorius case teaches three things. First, the papacy is real, but it is not magic: a pope must work, discern, correct, speak in time. Second, the Church can judge a pontifical fault severely without denying the succession of Peter. Finally, Christological truth is too precious to be sacrificed to a diplomacy of appeasement.
In a Catholic encyclopaedia, this line must be held without fear. Faith has no need of a cleaned-up history. It needs a history read in truth.
Death, burial and succession
The last years
Honorius dies on 12 October 638 according to the Holy See.[70] The Liber Pontificalis gives his burial at Saint Peter on the fourth day of the ides of October, which corresponds to 12 October.[71]
The pontifical notice attributes to Honorius three ordinations, with thirteen priests, eleven deacons and eighty-one bishops for various places.[72] This episcopal figure is high and underlines the ordinary activity of a pope governing a wide ecclesial network.
A long vacancy before Severinus
After Honorius, the see remains vacant for a long time: the Liber Pontificalis gives one year, seven months and seventeen days.[73] The doctrinal context weighs heavily. Severinus will have to face imperial pressure around the Ecthesis, the Monothelite document of Heraclius published shortly after the death of Honorius.[74]
The contrast with 625 is stark. Honorius had benefited from a swift succession; his successor again suffers the delays and tensions of the Empire. The pontificate of Honorius is thus a hinge: it begins in the post-Boniface V consolidation and ends in the Monothelite crisis.
What to retain of Honorius I?
A real pontificate, not a footnote
Honorius deserves better than a polemical line. He restored Saint Peter, built Saint Agnes, honoured martyrs, organised processions, formed his clergy, supported the English mission and ordained many bishops.[75][76]
He also deserves better than an embarrassed defence. His fault in the Sergius dossier is grave, because it touches the heart of the confession of Christ. Catholic posterity must be able to say both: legitimate pope and active pastor; faulty pope, condemned after his death.
The spiritual lesson: speak when faith is at stake
The most useful spiritual point is not easy indignation. It is the warning. A pastor may want peace and produce confusion. A formula may seem prudent and become an instrument of error. A truth silenced at the wrong moment may cost more than a clarified controversy.
The Church does not emerge weakened from this lucidity. Constantinople III confesses with force the two wills of Christ; Leo II receives the council; the definition of Vatican I, twelve centuries later, avoids precisely confusing the assistance promised to Peter with a diffuse infallibility of all papal words.
To go further
- Pope Boniface V — immediate predecessor, English mission and reform of pontifical confirmation.
- Pope Severinus — successor of Honorius, directly confronted with the Ecthesis.
- Pope Saint Martin I — martyr pope of resistance to Monothelitism.
- Council of Constantinople III (680-681) — definition of the two wills of Christ and condemnation of Honorius.
- Pope Vigilius — another difficult case often discussed with Honorius in debates on the papacy.
- Those who call themselves Catholic but reject the present authority of the Church — on the distinction between a doctrinal fault of a pope and an ex cathedra act.
Notes and sources
Notes and References
Holy See, official entry "Honorius I": 70th pope of the Catholic Church, pontificate beginning 27.X.625, ending 12.X.638, birth in Campania. URL: https://www.vatican.va/content/vatican/en/holy-father/onorio-i.html (page re-read and content re-verified word for word on 4 October 2026: mentions "70th Pope of the Catholic Church", "Beginning Pontificate 27.X.625", "End Pontificate 12.X.638", "Birth Campania"); cf. also John Chapman, Catholic Encyclopedia, "Pope Honorius I".
1 14 23 34 70Liber Pontificalis, notice "Honorius", ed. Louis Duchesne, Le Liber pontificalis, vol. I, Paris, 1886, p. 323-324; Latin text consulted via Fontistoriche, "Papa Onorio I": Campanian origin, father Petronius the consul, formation of the clergy, restorations of Saint Peter, Saint Agnes Outside the Walls, Saint Apollinaris, Saint Cyriacus, Santi Quattro Coronati, Saint Pancras, Saint Lucy, Saint Hadrian, monastery of Honorius, ordinations, burial. URL: https://fontistoriche.org/papa-onorio-i/ (consulted on 3 October 2026; page giving the text of the Liber Pontificalis according to the Duchesne edition; Latin text re-read and figures re-verified word for word on 4 October 2026 on the page: incipit "HONORIUS, natione Campanus, ex patre Petronio consule", "sedit ann. XII mens. XI dies XVII", "Fecit autem ordinationes III, presbiteros XIII, diaconos XI ; episcopos per diversa loca LXXXI", burial "sub die IIII id. octob.", "cessavit episcopatus ann. I mens. VII dies XVII").
2 7 11 24 26 27 28 33 37 39 42 43 44 45 46 47 71 72 73 75Third Council of Constantinople, Session XIII, 28 March 681 (date confirmed by Chapman: "In the thirteenth session, 28 March"): rejection of the letters of Sergius and Honorius as foreign to the apostolic dogmas ("quite foreign to the apostolic dogmas"); anathema against Sergius, Cyrus, Pyrrhus, Paul, Peter, Theodore of Pharan and Honorius. English text EWTN / Nicene and Post-Nicene Fathers, passage "anathematized Honorius who was some time Pope of Old Rome, because of what we found written by him to Sergius" (re-verified on 4 October 2026). URL: https://www.ewtn.com/catholicism/library/third-council-of-constantinople-11564 (consulted on 3 October 2026; same single EWTN compilation page as the other two conciliar references — see here the section "The Sentence against the Monothelites, Session XIII").
3 22 32 62 63First Vatican Council, dogmatic constitution Pastor aeternus, 18 July 1870, ch. 4: definition of the infallibility of the Roman Pontiff when he speaks ex cathedra, as pastor and doctor of all Christians, in defining a doctrine of faith or morals to be held by the universal Church. URL: https://www.vatican.va/content/pius-ix/la/documents/constitutio-dogmatica-pastor-aeternus-18-iulii-1870.html (consulted on 3 October 2026; Latin text with the "ex Cathedra" definition verified at that date).
4 20 67 69John Chapman, "Pope Honorius I", The Catholic Encyclopedia, vol. 7, New York, Robert Appleton Company, 1910; New Advent transcription: complete dossier on the letters of Honorius to Sergius, the Monothelite controversy, Constantinople III, Leo II, and the use of the Honorius affair in the debates on pontifical infallibility. URL: https://www.newadvent.org/cathen/07452b.htm (page re-read and passages re-verified word for word on 4 October 2026: incipit "Pope (625-12 October, 638), a Campanian, consecrated 27 October (Duchesne) or 3 November (Jaffe, Mann)", "The Monothelite question was raised about 634 in a letter to this pope from the Patriarch of Constantinople, Sergius", and "In the thirteenth session, 28 March").
5 15 19 21 25 36 38 56 57 65 68 74Pope Agatho, letter to Emperor Constantine IV, read at Constantinople III, in the acts of the sixth ecumenical council: Roman confession of the two wills and warning against silence before the truth; English translation EWTN / Nicene and Post-Nicene Fathers, passage "Woe is me, if I cover over with silence the truth which I am bidden to give to the exchangers, i.e., to teach to the Christian people and imbue it therewith" (text verified on New Advent, NPNF 2nd series, vol. XIV, "The Letter of Pope Agatho", on 4 October 2026). URL: https://www.ewtn.com/catholicism/library/third-council-of-constantinople-11564 (consulted on 3 October 2026, passage re-verified on 4 October 2026; EWTN compiles the full acts on this single page — see here the section "The Letter of Pope Agatho", body heading "THE LETTER OF POPE AGATHO").
6 58 59Bede the Venerable, Historia ecclesiastica gentis Anglorum, II, 17: Honorius I sends the pallium to Paulinus and a letter of exhortation to Edwin; he provides two pallia for the metropolitans Honorius and Paulinus so that one may consecrate the successor of the other. Fordham Sourcebook translation. URL: https://sourcebooks.web.fordham.edu/basis/bede-book2.asp (consulted on 3 October 2026; chapter entitled "Edwin receives letters of exhortation from Pope Honorius, who also sends Paulinus the pall. [A.D. 634]", with the passage "We have sent two pails [palls] to the two metropolitans, Honorius and Paulinus").
8 29 48 49 53 76Bede the Venerable, Historia ecclesiastica gentis Anglorum, II, 19: Honorius I then John IV write to the Scots on the observance of Easter and on the Pelagian heresy; important source for Roman liturgical unity in the British Isles. Fordham Sourcebook translation. URL: https://sourcebooks.web.fordham.edu/basis/bede-book2.asp (consulted on 3 October 2026; chapter entitled "How the aforesaid Honorius first, and afterwards John, wrote letters to the nation of the Scots, concerning the observance of Easter, and the Pelagian heresy. [A.D. 634]").
9 54Third Council of Constantinople, definition of faith, 680-681: Christ is confessed in two natures, with two natural wills and two natural operations, without opposition, his human will following and submitting to his divine will; Denzinger-Schoenmetzer nos. 553-559 (opening "Definition of the Two Wills of Christ", no. 553: "COUNCIL OF CONSTANTINOPLE III 680-681 — Ecumenical VI (against the Monothelites)", range 553-559 re-verified on 4 October 2026 on the online Denzinger table (https://www.clerus.org/bibliaclerusonline/en/dww.htm, from no. 553 to closing no. 559)); English text EWTN. URL: https://www.ewtn.com/catholicism/library/third-council-of-constantinople-11564 (consulted on 3 October 2026; same single EWTN compilation page — see here the section "The Definition of Faith").
10 31 55 60 61See the Ignispedia article Pope Saint Deusdedit: return of the Roman secular clergy, Eleutherius, crisis of Byzantine Italy and transition toward Boniface V.
12 40See the Ignispedia article Pope Boniface V: vacancy after Deusdedit, reform of confirmation by the exarch, English mission and transition toward Honorius I.
13 16 18 41 51Treccani, "Onorio I", Dizionario di Storia: Campanian nobleman, consecrated in 625 without personal confirmation by Heraclius, Christianisation of the Lombards and the Anglo-Saxons, growth of the ecclesiastical patrimony, two letters to Sergius in 633 and 634 condemned for their Monothelite ambiguities by Constantinople III. URL: https://www.treccani.it/enciclopedia/onorio-i_%28Dizionario-di-Storia%29/ (page re-read and text re-verified word for word on 4 October 2026).
17 35Bede the Venerable, Historia ecclesiastica gentis Anglorum, II, 18: Honorius of Canterbury, consecrated by Paulinus at Lincoln, receives the pallium and a letter from Pope Honorius repeating the rule of reciprocal consecration between metropolitans. Fordham Sourcebook translation. URL: https://sourcebooks.web.fordham.edu/basis/bede-book2.asp (consulted on 3 October 2026; chapter entitled "Honorius who succeeded Justus in the bishopric of Canterbury, receives the pall and letters from Pope Honorius. [A.D. 634]").
30 50 52Leo II, letter of Roman confirmation of the Third Council of Constantinople, 682-683 — confirmation by which Rome receives the council among the ecumenical councils, without this letter being by itself the foundation of its ecumenicity: anathema against the inventors of the new error and against Honorius, "who did not attempt to sanctify this Apostolic Church with the teaching of Apostolic tradition, but by profane treachery permitted its purity to be polluted"; exact formula quoted and discussed by John Chapman, Catholic Encyclopedia, "Pope Honorius I" (who writes: "his letter of confirmation, by which the council gets its ecumenical rank"). Second Leonine formula quoted by Chapman (letter to the Spanish bishops): "With Honorius, who did not, as became the Apostolic authority, extinguish the flame of heretical teaching in its first beginning, but fostered it by his negligence." URL: https://www.newadvent.org/cathen/07452b.htm (Chapman passages re-read and verified word for word on 4 October 2026 on New Advent).
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