313 · Milan, Italy
Edict of Milan
Emperor Constantine and co-emperor Licinius legalized Christianity across the Roman Empire, ending nearly three centuries of periodic persecution.
In February 313, Constantine and Licinius met in Milan and agreed to a policy of religious toleration that specifically restored rights and property to Christians. For almost three hundred years, being a Christian in the Roman Empire meant risking everything. Persecution came in waves: sometimes local and half-hearted, sometimes empire-wide and savage. The last great persecution under Diocletian, starting in 303, had been especially brutal, with churches burned, scriptures confiscated, and clergy imprisoned or killed. The Edict of Milan did not make Christianity the state religion, as many assume. It made it legal. Christians could worship openly, build churches, and hold property. But it also changed the Church in ways nobody anticipated. Once the faith was tied to imperial power, new problems emerged: political interference in theology, bishops jockeying for influence at court, and the slow entanglement of cross and crown that would shape European history for the next seventeen centuries.
Why it matters
Ended the era of Roman persecution and began the complex relationship between Church and state that defined Western civilization.
What Happened
After Constantine's victory at the Battle of the Milvian Bridge in 312, which he attributed to the Christian God, he met Licinius in Milan. Together they issued an agreement granting religious freedom throughout the empire, with specific provisions restoring confiscated Christian property. The persecutions were over. Churches could be built openly, and Christians could hold public office without hiding their faith.
Why It Still Matters
The Edict of Milan marks the moment Christianity stepped out of the catacombs and into the public square. That shift brought enormous benefits, including the freedom to organize, teach, and care for the poor on a large scale. But it also introduced temptations of wealth and political power that the Church has struggled with ever since. Understanding this turning point helps make sense of much of what followed, both the cathedrals and the corruption.