The Conversion of the Anglo-Saxons

Roman Britain Did Not Vanish Without a Trace

Christianity is present in Britain before the arrival of the Anglo-Saxons. Bede recalls the martyrdom of Saint Alban, the peace of the Church after the persecutions, then the troubles linked to Pelagianism and the invasions.^[3] This memory serves to grasp a crucial nuance: Augustine does not bring Christianity to the island of Britain for the first time; he reintroduces and organizes the mission to the English peoples settled there after the breakdown of Roman order.

After the Anglo-Saxon migrations, the British Churches survive above all in the west and the north. They do not disappear, but their relations with the Anglo-Saxon kingdoms are difficult. For Bede, the evangelization of the Angles is therefore carried out by two currents that will meet and sometimes oppose each other: the Roman mission coming through Canterbury and the Iro-Scottish mission coming through Iona and Lindisfarne.

Bertha: A Christian Queen at the Heart of Kent

The choice of Kent is not only geographical. Æthelberht rules a powerful kingdom in the south-east, open toward the Frankish continent. His marriage to Bertha creates a religious and diplomatic bridge. Bede specifies that Bertha, from the Frankish royal family, had received permission to practise her faith with Bishop Liudhard.^[4]

The Canterbury heritage preserves this memory. UNESCO presents St Martin's in Canterbury, the ruins of St Augustine's Abbey and the cathedral as a group bearing witness to the reintroduction of Christianity in the south of Great Britain by Augustine, begun at St Martin's where Bertha already prayed, and leading to the conversion of Æthelberht.^[5]

This presence of Bertha does not replace Augustine's mission. Rather, it explains why the first contact can be peaceful: the king already knows Christianity through his wife, without having yet adopted it. The Anglo-Saxon conversion is thus born of an encounter between Rome, the Frankish world and a pagan court opened up by marriage alliance.

Gregory the Great Chooses Augustine

In 596, Pope Gregory the Great sends Augustine and several monks to preach to the Angles. Bede places the initiative in the fourteenth year of Emperor Maurice and presents Gregory as moved by divine inspiration.^[6] The mission is not an ordinary political embassy: these are monks sent to proclaim the faith, found a Church and form a people.

The departure is difficult. The missionaries, frightened by the distance, the unknown language and the reputation of a people they judge to be rough, send Augustine back to Rome to ask for the project to be abandoned. Gregory refuses. In the letter preserved by Bede, he reminds them that it is better not to begin a good work than to abandon it once begun.^[7]

"Carry out the good work you have undertaken with the help of the Lord." — Gregory the Great, letter to the monks sent to the Angles (French trans. of the article from the Latin)^[8]

This scene matters because it humanizes the beginnings of the mission. Augustine is not presented as a self-assured conqueror: he begins by being afraid. The English conversion is born of obedience resumed after real hesitation.

Frankish Interpreters and the Landing at Thanet

In 597, Augustine arrives on the Isle of Thanet with about forty companions. Bede notes that they took, on Gregory's orders, Frankish interpreters: a concrete sign that the mission is prepared and that it passes through continental networks.^[9]

The first meeting with Æthelberht takes place in the open air. Bede explains that the king refuses to receive them inside a house, for superstitious fear of possible spells. The monks nevertheless come with a silver cross, an image of Christ and the chanting of the litanies.^[10]

The king is not converted immediately. His answer is cautious: the missionaries' words are fine, but new and uncertain; he does not wish to abandon all at once what he has followed with all his people. In return, he grants them hospitality, sustenance and the freedom to preach at Canterbury.^[11]

St Martin's, First Liturgical Base

Bede reports that Augustine and his companions use a church dedicated to Saint Martin, built long before during the Roman presence and attended by Bertha.^[12] The community prays, chants the psalms, celebrates Mass, preaches and baptizes there.

This information is corroborated by the present heritage value of St Martin's. UNESCO stresses that the church preserves very ancient built fabric and that it is associated with a continuity of worship going back to the 6th century.^[13] The building visible today has been altered, but the place remains one of the strongest material witnesses to the mission.

The Baptism of Æthelberht and the Foundation of the Church of Canterbury

Bede gives no detailed scene of Æthelberht's baptism as Gregory of Tours does for Clovis. He says that the king ends up believing and that many are converted, drawn by the simplicity of life of the monks and by the gentleness of the heavenly promises.^[14]

Augustine then establishes his see in the royal town of Canterbury. Gregory sends him the pallium (a band of white wool worn over the shoulders, sign of his office as archbishop) and plans an organization into two ecclesiastical provinces, London and York, with twelve bishops each; this Roman programme is not realized as such immediately, but it shows the ambition: to convert a people and give it a stable structure.^[15]

The abbey founded outside the walls, first dedicated to Saints Peter and Paul and later known as St Augustine's Abbey, becomes the burial place of the first archbishops and Christian kings of Kent. English Heritage recalls that it belongs today to the Canterbury UNESCO site because of its importance for the history of Christianity in England.^[16]

The Letter to Mellitus

One of the most famous texts in the dossier is Gregory's letter to Mellitus, in 601. Gregory asks that pagan temples, if well built, should not be destroyed, but that the idols should be removed, the places purified with holy water, altars and relics placed there, and the old gatherings turned into Christian feasts.^[17]

"The temples of the idols among that people must not be destroyed, but only the idols within them." — Gregory the Great, letter to Mellitus (French trans. of the article from the Latin)^[18]

This text does not recommend syncretism. Gregory demands the destruction of the idols, but he distinguishes between religious error and places, habits and social rhythms. His pastoral principle is clear: a people does not rise to the summit in a single leap; it must be led by degrees.

A Strategy of Controlled Inculturation

The letter to Mellitus is often cited as a model of inculturation. It must be read exactly. Gregory does not say: let the Angles keep their gods. He says: purify the places, replace the sacrifices with festive meals ordered to God, and lead the faithful toward Christian joy.^[19]

This method explains part of the initial success: Rome does not merely send an abstract message. It gives its missionaries a concrete intelligence of religious change.

The Return of Paganism After Æthelberht

The death of Æthelberht shows the fragility of the work. Bede recounts that after the death of the king and of Sabert of Essex, their successors restore idolatry. Mellitus and Justus even leave Britain for a time.^[20] The Roman mission could have collapsed.

Laurence of Canterbury nevertheless obtains the conversion of Eadbald, son of Æthelberht, and recalls the bishops. The episode shows that converting a king is not enough: a dynasty, a clergy, practices and institutions capable of surviving political crises must be formed.^[21]

Northumbria: The Great Turning Point of 627

The conversion of Northumbria follows a pattern close to Kent's: marriage, Christian queen, accompanying bishop, royal deliberation, then public baptism. Edwin marries Æthelburh, daughter of Æthelberht; Paulinus is ordained bishop to accompany her and work for the conversion of the kingdom.^[22]

The strongest scene is the council held by Edwin in 627. Bede reports the famous speech of a counsellor comparing human life to the flight of a sparrow briefly crossing a warm hall before vanishing into the night. If the new doctrine brings certainty about what precedes and follows this life, it deserves to be followed.^[23]

"So this life of man appears for a short space; but of what comes before and what comes after, we know nothing." — Edwin's counsellor, according to Bede (French trans. of the article from the Latin)^[24]

The pagan priest Coifi then asks to destroy with his own hands the altars he had served. Edwin is baptized at York on Easter Day, 12 April 627, in a wooden church dedicated to Saint Peter.^[25]

Wessex, Lindisfarne, Mercia, Sussex

The English conversion does not proceed through Canterbury alone. In 635, Birinus evangelizes the West Saxons and baptizes King Cynegils, with King Oswald of Northumbria as political and spiritual sponsor.^[26] The same period sees Aidan, come from Iona, establish his see at Lindisfarne at Oswald's request.^[27]

The case of Aidan is decisive. Bede admires his poverty, his preaching on foot, his care for the poor and his gentle pedagogy toward hearers still little formed.^[28] The Iro-Scottish mission does not at first depend on Rome on every disciplinary question, notably the reckoning of Easter, but it plays a major part in the Christianization of the north.

Mercia receives the faith in the middle of the 7th century, notably through Peada and after the defeat of Penda; the East Saxons experience relapses and then a restoration through Cedd and Jaruman.^[29] Finally, Bede presents Wilfrid's mission to the South Saxons in 681 and then the Christianization of the Isle of Wight around 686–687 as the symbolic completion of the cycle.^[30]

Two Missionary Currents

The religious map of 7th-century England cannot be reduced to a single Rome–Canterbury line. The north receives much through Iona and Lindisfarne; the south-east remains structured by Canterbury; Frankish, Irish and Roman ties constantly intersect.

This plurality produces tensions, above all around the date of Easter and certain ecclesiastical customs. The Synod of Whitby in 664, under King Oswiu, gives preference to the Roman usage for Northumbria.^[31] The event does not mean that the monks of Iona were heretics; it marks the progressive integration of the English Churches into a common Latin discipline.

Theodore of Tarsus and the Organization of the English Church

After Whitby, the action of Theodore of Tarsus, Archbishop of Canterbury from 669, gives the English Church a more coherent structure. Bede shows Theodore visiting the provinces, instructing the Churches, holding synods and consolidating Catholic doctrine.^[32]

The Synod of Hertford (673 according to the year of the Incarnation given by Bede; the minutes of the synod, dated 24 September of the first indiction, correspond to 24 September 672) organizes common discipline: respect for liturgical dates, boundaries of dioceses, regular synods, order among bishops, marriage rules.^[33] That of Hatfield (680 according to Bede; the minutes, dated 17 September of the eighth indiction, correspond to 17 September 679) explicitly confesses the Catholic faith received from the ecumenical councils, in the context of the Christological controversies.^[34]

The conversion of the Anglo-Saxons is therefore fully stabilized only when the faith becomes a Church: bishops, sees, monasteries, synods, schools, liturgy and memory.

A Culture of the Book

Conversion brings Scripture, the Latin liturgy, papal letters, monastic teaching and schools. Canterbury, Wearmouth-Jarrow, Lindisfarne and other centres become places of copying, biblical commentary and exchange with Rome and the continent.

Bede himself is the fruit of this transformation. A monk of Jarrow, formed in a world of imported books, computus, exegesis and liturgy, he can write a Christian national history because the mission produced the intellectual instruments that make such a work possible.

A New Royal Legitimacy

As with Clovis, the conversion of an Anglo-Saxon king does not abolish political violence. Edwin, Oswald, Oswiu, Penda and Cædwalla belong to a world of wars and rivalries. But baptism introduces a new language: the king must protect the Church, listen to the bishops, found monasteries, receive moral correction and inscribe his power in the history of salvation.

This new legitimacy is seen in the papal letters. Gregory writes to Æthelberht as to a king called to spread the faith among the peoples subject to his authority, while Boniface V exhorts Edwin, still pagan, to welcome the faith, and Æthelburh, already Christian, to persevere in it and to work for her husband's conversion.^[47][48]

A Missionary English Church

The paradox is a fine one: an evangelized people in turn becomes an evangelizer. In the 7th–8th centuries, Anglo-Saxons such as Wilfrid, Willibrord and Boniface take part in the mission to the Germanic continent. The English conversion is therefore not an end point; it becomes a source.

"Did Augustine convert the whole of England?"

No. Augustine launches the Roman mission in Kent and founds Canterbury, but the conversion of the English kingdoms lasts nearly a century. Northumbria, Wessex, Mercia, East Anglia, Essex, Sussex and the Isle of Wight each have their own rhythm, crises and missionaries.

"Did the Roman mission erase the Celtic Church?"

No, but in the end it provides the common disciplinary framework. Iona, Aidan and Lindisfarne play an immense role, above all in the north. The tensions over Easter and usages must not make us forget the holiness and missionary effectiveness of this current. The 7th-century Roman unification seeks a visible communion, not the erasure of all local memory.

"Was the conversion forced?"

The sources show royal conversions that carry peoples with them, but they distinguish several situations. Æthelberht begins by authorizing preaching without converting immediately; Edwin consults his counsellors; Coifi voluntarily destroys his former altars. There are also violent episodes, notably around the Isle of Wight. An honest synthesis must therefore avoid two caricatures: neither a pure modern individual choice, nor a simple uniform military coercion.

The conversion of the Anglo-Saxons is one of the great missionary successes of the early Middle Ages. It begins with a fragile mission sent from Rome, passes through the cautious hospitality of Kent, takes root in Canterbury, receives a powerful Iro-Scottish relay at Lindisfarne, goes through pagan relapses and ends in a Church structured by synods, bishops and monasteries.

It also shows a deep law of evangelization: faith rarely advances through a single spectacular act. It passes through persons, marriages, letters, translations, liturgies, places, kings, monks, crises and fresh starts. From Bertha praying at St Martin's to Bede writing at Jarrow, a new world was born.

• The Baptism of Clovis
• Saint Columbanus and the Irish Missions
• Benedictine Monasticism
• Anglicanism
• History of Catholicism