On April 30, 311 AD, the Roman Emperor Galerius issued what became known as the Edict of Serdica, which made the first formal move to legalize the Christian religion, ending nearly a decade of brutal persecution.
Though history tends to credit Constantine, with his Edict of Milan in 313 AD, as the great liberator of Christianity, it was Galerius—a former persecutor turned penitent—who first put ink to paper in acknowledging the right of Christians to worship freely. His decision marked a historical watershed moment: the first time the Christian faith received official toleration within the Roman world.
Background: Rome’s uneasy relationship with Christianity
Since its emergence in the 1st century AD, Christianity was often seen as a suspicious and subversive sect by Roman authorities. In contrast to the polytheistic traditions of the empire, Christians refused to offer sacrifices to the emperor, worship Roman gods, or participate in civic religious festivals. The anti-militaristic teachings of the Christians didn’t help much either, especially in an expansionist empire like the Roman one. These behaviors were viewed not only as religious defiance, but as threats to public order and imperial unity.
For over two centuries, Christians lived under intermittent waves of persecution, often local and sporadic. That changed dramatically in 303 AD, when Emperor Diocletian, at the urging of Galerius, launched the Great Persecution—the most systematic and brutal suppression of Christianity in Roman history. The Romans razed churches, burned scriptures, and imprisoned or executed thousands. They stripped Christians of legal protections so that they often faced torture or death.
But instead of extinguishing the faith, this campaign revealed the resilience and underground strength of Christian communities. It became clear to many, including Galerius himself, that persecution had failed to suppress Christianity. On the contrary, it may have even fortified it.
Galerius: From persecutor to penitent
Gaius Galerius Valerius Maximianus began as a staunch pagan and opponent of the Christian faith. A key instigator of the 303 edicts, he had seen Christianity as a blasphemous cult undermining Roman unity. However, by 311 the political and spiritual winds had shifted. Galerius was now gravely ill, likely with a painful form of cancer. He confronted both his mortality and the futility of the persecutions he had once championed.
In an extraordinary about-face, Galerius issued an edict from his imperial residence in Serdica (modern-day Sofia, Bulgaria). He declared an end to hostilities against Christians. In the edict, he acknowledged the steadfastness of Christians in the face of torment. He granted them legal permission to worship freely, so long as they respected the peace of the empire.
The Edict of Serdica: A Milestone of Religious Toleration
The edict reads not as a triumphant proclamation, but as a humble concession, even laced with hints of remorse:
“Therefore, with our indulgence, they may again be Christians and may hold their assemblies, provided they do nothing contrary to good order.”
This was no minor policy adjustment. It was the first official recognition of Christianity as a lawful religion within the Roman Empire. Though the edict stopped short of granting full equality or imperial endorsement, it legally ended the Great Persecution. It allowed Christians to practice their faith without fear of imprisonment or execution.
Moreover, the edict asked Christians to pray for the emperor and the empire. It acknowledged their potential role as contributors to civic and moral order rather than as enemies of the state.
Galerius died just five days later, on May 5, 311. But his edict remained a landmark moment. It paved the way for future emperors—especially Constantine the Great—to deepen ties with Christianity and eventually integrate it into the imperial framework.
Within two years, in 313 AD, Constantine and Licinius would issue the more famous Edict of Milan, expanding the terms of tolerance and guaranteeing full religious freedom to all citizens. But the legal and psychological breakthrough had already occurred. Christianity had been acknowledged not as a threat, but as a legitimate part of Roman religious life.
Why the Edict still matters
The Edict of Serdica is a reminder that history often turns not just on great battles or revolutions, but on moments of reflection and reversal. Galerius’ decree may have been born of illness and political calculation. However, it showed the power of a changing conscience—and of a society slowly moving toward pluralism.
April 30 should be remembered as the day when Christianity first stepped out of the shadows of illegality, and when the empire that once sought to destroy it began to accept it.
It is the day that religious persecution began to give way to religious tolerance, and it opened a new chapter in the long and complex story of faith, power and freedom in the ancient world.
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