Edict of Milan

Setting the scene

By 313 CE, Christianity had been persecuted intermittently in the Roman Empire for nearly 250 years. Emperors Nero, Domitian, and Diocletian had launched major persecutions, with Diocletian's 'Great Persecution' (303-311) being the most severe—churches destroyed, scriptures burned, Christians imprisoned and executed. Despite persecution, Christianity had grown, especially in the East, attracting perhaps 10% of the empire's population by 300 CE. The religion appealed to the poor, women, and slaves with its message of equality and eternal life.

What happened

In 312 CE, Constantine defeated Maxentius at the Battle of Milvian Bridge, reportedly after seeing a vision of a cross. He became Western Emperor. In 313, Constantine met Eastern Emperor Licinius in Milan. Together they issued the Edict of Milan (actually a letter, not a formal edict), proclaiming religious toleration throughout the empire. The edict specifically granted Christians freedom of worship, restored confiscated property, and ended persecution. It did not make Christianity the official religion—that would come in 380 CE under Theodosius—but it ended state-sponsored persecution.

Why it still matters

The Edict of Milan transformed Christianity from persecuted sect to favored religion. Constantine himself converted (baptized on his deathbed in 337) and patronized the church, building basilicas and calling the Council of Nicaea in 325 to resolve theological disputes. The edict began the Christianization of the Roman Empire and, by extension, Europe. It demonstrated that religious toleration could be politically advantageous and set precedent for separation of religious and state persecution. The edict's principles influenced later concepts of religious freedom, though it would take 1,300 years for full religious liberty to develop in the West.

Background

The Edict of Milan was the 13 February 313 AD agreement to treat Christians benevolently within the Roman Empire. Western Roman Emperor Constantine I and Emperor Licinius, who controlled the Balkans, met in Mediolanum and, among other things, agreed to change policies towards Christians following the edict of toleration issued by Emperor Galerius two years earlier in Serdica. The Edict of Milan gave Christianity legal status and a reprieve from persecution but did not make it the state church of the Roman Empire, which occurred in AD 380 with the Edict of Thessalonica, when Nicene Christianity received normative status. Constantine played a central role in the policy shift. Even centuries later, this episode remains a reference point for how empires rise, fracture, and transform.