The Edict of Milan

Ten years of imperial persecution

The decision of 313 responds first to the Great Persecution begun in 303 under Diocletian. The first edicts order the destruction of churches, the surrender of the Scriptures, the exclusion of certain Christians from public office, then harsher measures against the clergy and the faithful. Lactantius, a Christian witness hostile to the persecutors, preserves a very vivid memory of this rupture: Christianity is no longer merely despised or watched; it becomes the object of a coordinated imperial policy.^[4][5]

The persecution varies by region. In the West, Constantius Chlorus proves less relentless; in the East, Galerius and Maximin Daza prolong the repression. This geography matters: the Agreement of Milan is not an abstract idea of modern tolerance, but a response to very concrete confiscations — closed buildings, seized books, communities deprived of their property and sometimes of their pastors.^[6]

The Edict of Galerius in 311: a first capitulation

Two years before Milan, the emperor Galerius promulgates an edict of toleration at Serdica, posted at Nicomedia on 30 April 311. The text acknowledges the failure of the persecution: Christians have not been brought back to the traditional cults, and many no longer render any public worship, neither to the Roman gods nor to the Christian God. Galerius therefore allows them to assemble, provided they do not disturb public order, and asks them to pray to their God for the emperor and for the State.^[7]

This edict of 311 is a turning point, but it remains limited. It does not clearly settle the restitution of confiscated property; it does not create a general religious freedom; it still depends on the goodwill of the emperors in place. Maximin Daza, in the East, continues to encourage hostile measures against Christians after 311. Milan therefore comes as a broader and more stable clarification: not only may Christians exist, but their communities must recover what was taken from them.^[8]

Constantine's victory at the Milvian Bridge

On 28 October 312, Constantine defeats Maxentius at the Milvian Bridge and enters Rome as master of the West. Lactantius recounts that before the battle, Constantine receives the order to mark his soldiers' shields with the heavenly sign of God; Eusebius will later give a fuller version of the vision of the sign of the Cross.^[9][10]

The exact question of Constantine's inner conversion is debated by historians, but the political fact is not: after 312, Constantine increasingly presents himself as the protector of Christianity. He writes to the African authorities to favour the Catholic Church, grants exemptions to the clergy, and supports ecclesial reconstruction. The Agreement of Milan belongs to this sequence: the military victory opens a new religious policy.^[11][12]

Milan, February 313: political alliance and dynastic marriage

Constantine and Licinius meet at Mediolanum, present-day Milan, in February 313. The meeting is first of all political: to seal the alliance between the two Augusti and to celebrate the marriage of Licinius to Constantia, Constantine's half-sister — Lactantius specifies that Licinius came to Milan to receive his wife there and that the wedding was solemnised there.^[13] Within this framework, the two emperors also settle the Christian question.^[14]

The text preserved by Lactantius begins by recalling this meeting: Constantine and Licinius, gathered at Milan under favourable auspices, examined what concerned the common good and public security, then placed first the decisions relating to reverence towards the divinity.^[15] The language matters: this is not merely a Christian privilege, but a policy of religious peace intended to render the divinity favourable to the Empire.

Nicomedia, 13 June 313: the rescript that has come down to us

What we call the "Edict of Milan" is known above all through a text published at Nicomedia on 13 June 313, after Licinius's victory over Maximin Daza. Lactantius preserves the Latin text in chapter 48 of De mortibus persecutorum; Eusebius gives a Greek version of it in Book X of his Ecclesiastical History.^[16][17]

This double transmission is precious. Lactantius writes from the Latin viewpoint, close to Constantine's court; Eusebius, bishop of Caesarea, writes from the Eastern, ecclesiastical viewpoint. Both witnesses confirm the same core: freedom of religion, absence of coercion, restitution of places of worship, and possible compensation from the treasury for those who had bought the confiscated property.

Why still speak of an edict?

In ordinary usage, "edict" means a sovereign decision. In strict Roman law, the surviving document looks more like a letter-rescript addressed to the governors. Encyclopedia.com sums up the nuance well: no edict would have been published at Milan itself; the provisions arising from the agreement were then recorded in a rescript of Licinius for the East.^[18]

The nuance is not a scholarly detail. It recalls that the event of 313 has two layers: a common political decision taken at Milan, then an administrative publication applying that decision in the provinces. The article therefore keeps the traditional name, but the reader must know exactly what it covers.

A broadly formulated religious freedom

The central passage grants Christians and all others the freedom to follow the religion they prefer. Lactantius's formulation is remarkable: the emperors wish that no one be prevented from giving his heart to the religion he judges fitting for himself.^[19]

In other words — this is a paraphrase, not a literal quotation — the rescript gives Christians as well as all other subjects the free faculty of following whatever religion each one has chosen. The Latin preserved by Lactantius reads: ut daremus et Christianis et omnibus liberam potestatem sequendi religionem quam quisque voluisset.^[20][21]

This freedom is not yet a modern doctrine of rights of conscience in the contemporary sense. It remains expressed in the religious and political language of the Empire: the emperors wish every heavenly divinity to be favourable to Roman power and its subjects. But the practical result is considerable: Christianity is no longer treated as an illicit superstition to be rooted out.

The mandatory restitution of Christian property

The text does not merely authorise worship. It orders that the places where Christians were accustomed to assemble be returned to them free of charge, without price, without compensation demanded from the community. If this property was legally bought by private individuals, they may request compensation from the treasury; the Christian community, for its part, must recover the property.^[22]

This clause is crucial. It recognises Christian communities as subjects capable of collective ownership. The word is not that of a "parish" in the medieval sense, but the legal idea is already there: Christians are no longer merely tolerated individuals; they form an identifiable social body, with places, property, leaders and rights.

A religious peace for the whole Empire

Eusebius stresses the universality of the measure: the text applies to Christians, but also to all who wish to follow their religion. The official aim is public peace and divine favour upon the Empire.^[23]

This breadth explains why it would be wrong to present the Edict of Milan as a forced Christianisation. In 313, the traditional cults continue to exist; pagan temples are not closed by the text; citizens do not become Christians by decree. The shift lies elsewhere: the Roman state ceases to regard the Church as a legal enemy.

Christians emerge from legal clandestinity

Before 313, public Christian existence depended on an unstable balance: periods of relative peace, local hostility, denunciations, imperial measures, confiscations. After 313, the community can exist in the open. It can rebuild its places of worship, defend its property, and correspond officially with the authorities.

The visible consequence is architectural. The great Christian basilicas of the 4th century become possible because a persecuted Church does not build lasting public monuments. The Constantinian turning point does not create the Christian faith; it creates the material and legal conditions for its visibility.

Bishops become public interlocutors

The new policy also makes bishops interlocutors of the State. Constantine writes to Caecilianus of Carthage to give financial support to the Catholic Church of Africa; he grants exemptions to clerics; he intervenes in the Donatist crisis to seek ecclesial unity.^[24][25]

This change carries both a grace and a risk. Grace: the Church can evangelise, build, protect the poor, and settle its disputes with a security unknown before. Risk: ecclesiastical affairs become more exposed to imperial arbitration. The history of Nicaea, Donatism and the Arian conflicts will soon show that legal peace does not remove internal tensions.

The memory of the martyrs changes function

The Edict of Milan does not replace the age of the martyrs; it closes it legally. The Christians of the 4th century do not stop venerating the martyrs: on the contrary, their tombs, basilicas and calendars take on new importance. But the martyr is no longer only the figure of the persecuted Church; he becomes the witness of a spiritually victorious faith publicly recognised.

This memory is essential to avoid an overly political reading of the turning point of 313. The Church does not enter the Empire as a new ideology carried by a prince; she enters it with three centuries of confession, liturgy, episcopal succession, catechesis, charity and shed blood.

It does not make Christianity the state religion

The most frequent confusion is to attribute to 313 what belongs to 380. The Edict of Milan ends the persecutions and restores freedom to Christians; the Edict of Thessalonica, published on 27 February 380 by Theodosius, Gratian and Valentinian II, legally defines the Nicene Catholic faith as the religion of the Empire.^[26]

Between the two dates lie sixty-seven years of conflicts, councils, shifting imperial policies and Christological debates. Nicaea in 325, Constantinople in 381 and the struggle against Arianism belong to this intermediate period. To say that "Constantine made Christianity the state religion in 313" thus erases the real chronology.

It does not create the biblical canon or Christian doctrine

The Edict of Milan speaks neither of the biblical canon, nor of the divinity of Christ, nor of the Trinity, nor of the liturgy. It is not a doctrinal text: it is an act of religious policy. The Christian faith already existed, with its Scriptures read in the liturgy, its bishops, its martyrs, its controversies and its rules of faith.

The Council of Nicaea I would be convened twelve years later to answer the Arian crisis. Even there, Nicaea does not "vote" to invent the divinity of Jesus; it formulates against Arius a confession the bishops judge received from the apostolic faith. The Edict of Milan provides a framework of peace; it does not manufacture the content of the faith.

It does not immediately remove political ambiguities

Licinius, co-signatory of the agreement, will later become Constantine's adversary. Relations between the two Augusti deteriorate into civil war; Constantine becomes sole master of the Empire in 324. The Christian sources, above all Eusebius, then blacken Licinius as a reborn persecutor.^[27]

This evolution shows that the Edict of Milan is not a simple tale in which two emperors suddenly become stable servants of the Church. It is a real imperial compromise — politically useful, religiously decisive, but fragile in a world where personal power, dynastic rivalries and religious convictions remain intertwined.

Eusebius sees a providential deliverance in it

Eusebius of Caesarea writes as a bishop who witnessed both persecution and restoration. In Book X of the Ecclesiastical History, he gathers the laws favourable to the Church and presents them as proofs of a providential reversal. The tone is one of deliverance: destroyed churches rise again, communities breathe, the enemies of God are confounded.^[28]

This reading is theological before it is neutral. Eusebius is not a distant chronicler: he interprets the event in the biblical language of the Exodus and of divine victory. But his testimony remains irreplaceable, because he preserves the very text of the rescript and shows how 4th-century Christians understood 313.

Lactantius sees in it the defeat of the persecutors

Lactantius gives another colour. His De mortibus persecutorum recounts the death of the persecutors as a series of divine judgments. The Edict of Milan is placed at the end of this logic: those who sought to destroy the Church die, retreat or are defeated; Christians at last obtain freedom.^[29]

His narrative is engaged, sometimes violent, but it has major historical value. Without Lactantius, we would not have the Latin text of the Edict of Galerius and of the rescript of 313. Christian polemic here transmits a first-rate administrative document.

The Christian West will make it a symbol of freedom

In Christian memory, the Edict of Milan becomes the symbol of a passage: from the persecuted Church to the publicly recognised Church. This symbol is accurate, provided it is not crushed under slogans. The event is neither the "birth" of the Church, nor the automatic "corruption" of the Gospel by the Empire. It is an ambivalent historical transformation: a real freedom, accompanied by a new proximity to power.

For a Catholic reading of history, this ambivalence matters. Providence can use an emperor, a victory and an administrative rescript; but the Church does not draw her truth from Constantine. She receives in 313 a legal peace — not her origin, not her Creed, not her mission.

A major historical landmark

The Edict of Milan remains one of the most important dates in Christian history, not because it invents the Church, but because it changes her public status. Before 313, Christianity may be locally tolerated, yet it remains vulnerable to a resumption of repression. After 313, it becomes a recognised presence in the imperial sphere.

The event also helps us understand what follows: Constantinian basilicas, ecclesial disputes brought before the emperor, ecumenical councils, the progressive Christianisation of the laws, then the lasting tension between the spiritual freedom of the Church and political support from power.

A lesson in historical precision

For the contemporary reader, the Edict of Milan teaches above all how to distinguish the stages. 311: Galerius tolerates Christians after the failure of persecution. 313: Constantine and Licinius generalise freedom and order restitutions. 325: Nicaea defines the faith against Arius. 380: Theodosius makes the Nicene faith the official norm of the Empire.

This precision avoids two opposite caricatures. The first imagines that Constantine "manufactured" Christianity by decree. The second treats 313 as a mere administrative detail. The historical truth is denser: Christianity already existed fully as faith, Church and liturgy; the Edict of Milan gives it a public freedom that changes the conditions of its expansion.

• The Neronian persecutions — the first great Roman persecution against Christians
• The Christian catacombs of Rome — the funerary and liturgical memory of the first centuries
• Council of Nicaea I — the great Christological definition twelve years after Milan
• Council of Constantinople I — the Nicene reception after the Edict of Thessalonica
• What if history were not what we were always told? — a Christian reading of history and Providence