when did rome become christian
Rome became Christian gradually, not all at once. The key milestones were 313 CE , when Constantine legalized Christianity, and 380 CE , when it became the official state religion under Theodosius I.
Quick Scoop
If you mean when Rome stopped persecuting Christians , the answer is 313 CE.
If you mean when Christianity became the official religion of the Roman Empire , the answer is 380 CE.
What happened
- 312–313 CE: Constantine’s conversion and the Edict of Milan ended official persecution and legalized Christianity.
- 325 CE: The Council of Nicaea helped organize Christian doctrine across the empire.
- 380 CE: The Edict of Thessalonica made Nicene Christianity the official state religion.
Short answer
So, the simplest answer is: Rome became Christian in stages, with legal acceptance in 313 CE and official state status in 380 CE.
| Milestone | Date | Meaning |
|---|---|---|
| Legalization of Christianity | 313 CE | Christians were no longer officially persecuted and could worship openly | [9][1][3]
| Official state religion | 380 CE | Nicene Christianity became the Roman Empire’s official religion | [3][5]