Council of Nicea
The First Council of Nicaea formally opens at Nicaea under imperial sponsorship to address the Arian controversy and other church disputes.
Permanent historical records · Updated 2026-11-03
325 in Roman Empire
Explore 6 historical events and records for Roman Empire in 325.
Historical records for Roman Empire in 325
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Arius Condemned at Nicaea
The bishops assembled at Nicaea condemn Arius and his principal theological claims after extended debate.
Council of Nicea
The Council of Nicaea adopts a creed affirming the Son as of the same substance with the Father and condemns Arius's teaching.
Eustathius Supports Nicene Teaching
Eustathius represented the Antiochene church at the Council of Nicaea and defended the theological position subsequently identified with Nicene orthodoxy.
Execution of Licinius
Constantine orders the execution of the former emperor Licinius after initially permitting him to live in retirement.
Nicaea Easter Agreement
The Council of Nicaea also seeks a common method for determining the date of Easter across Christian communities.
How these records were prepared
Generated from the World History Database historical_events table. Identical display records are collapsed; descriptions otherwise retain the stored text. Coverage and source quality vary. Check primary and specialist sources before citing individual historical claims.