Chronograph Русский Open the atlasAtlas

First Council of Nicaea

The first ecumenical council of the Church, convened by Constantine, condemned Arius, adopted the Nicene Creed declaring the Son “of one substance with the Father” and agreed on a common reckoning of Easter.

Date
between May and June 325 – between July and August 325exact date unknown: an interval is given · duration: ≈ 2 months
Place
Nicaeatoday: İznik, Bursa Province, Turkey · Balkans and Anatolia
Participants
Constantine the Great, Arius, Roman Empire
Threads
Europe in the Roman age (1st–5th c.)
Also known as
Council of Nicaea; Nicene Council; Никейский собор; I Вселенский собор

The dispute between Arius, a presbyter of Alexandria who taught that the Son was created by the Father, and his bishop Alexander had divided the eastern churches. Constantine summoned the bishops to Nicaea in Bithynia and attended the opening himself. Some 250–300 bishops came, overwhelmingly from the East (tradition speaks of 318); Hosius of Corduba may have presided. The council opened on 20 May or perhaps in June and closed in the summer of 325.

It adopted a creed built around the word homoousios (“of one substance”), which all but two bishops signed; Arius was exiled. The council also issued twenty canons on church discipline and set out a common way of reckoning Easter. The Arian controversy continued for decades, but the Nicene Creed, expanded at Constantinople in 381, became the core statement of faith of most Christian churches.

Open in the interactive atlas

Connections

Related events

  • Edict of Thessalonica27 February 380 · Balkans and Anatoliathe Nicene faith became the religion of the state
  • Council of Chalcedon8 October – 1 November 451 · Balkans and Anatoliathe fourth ecumenical council reaffirmed the Nicene Creed
  • Second Council of Nicaea24 September – 23 October 787 · Balkans and AnatoliaThe seventh ecumenical council met in the same city as the first (325)

Same participants

Meanwhile in the world

Other regions, within 25 years of this event

Western and Central Europe

Eastern Europe

The same period

Sources

  1. Wikipedia (English): First Council of Nicaea
  2. Wikipedia (Russian): Первый Никейский собор
  3. Chadwick H. The Early Church. — Harmondsworth: Penguin, 1967.
  4. Карташёв А. В. Вселенские соборы. — Париж, 1963.
  5. Wikidata: Q133331