First Council of Nicaea
Bishops condemn Arianism and adopt the Nicene Creed
Summoned by Emperor Constantine, the first ecumenical council of bishops condemned Arianism and adopted the Nicene Creed, declaring the Son of one substance with the Father. It set a precedent for settling church disputes with imperial backing.
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Meanwhile around the world (±25 years)
Europe
- 313 Edict of Milan — 12 years earlier
- 330 Founding of Constantinople — 5 years later
Africa
- c. 330 Aksum adopts Christianity — 5 years later
Asia
- c. 320 Founding of the Gupta Empire — 5 years earlier
Alive at the time
- Constantine the Great (aged 53)
- Ezana of Axum (aged 5)
- Anthony the Great (aged 74)