4th century
Nicaea and the eastern Roman Church
The Council of Nicaea was an ecumenical council summoned by Constantine to address disputes dividing the Christian Church, especially the controversy surrounding Arius and the Meletian schism. Meeting from 20 May 325 for about a month, it condemned Arius and affirmed the formula that the Father and Son were “of the same substance.” It also formalized Alexandria’s supervisory authority over a vast Egyptian diocese.
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The Story
Constantine summoned the Council of Nicaea in early AD 325 after consolidating control over the Roman world. The assembly was intended to resolve the doctrinal conflict surrounding Arius, the Meletian schism, and other disputes affecting the Christian Church. It opened on 20 May and continued for approximately one month.
The council condemned Arius and his followers and adopted the formula that the Father and Son were “of the same substance,” or homoousios. This expression satisfied Christians who believed salvation required a fully divine Christ, although many Greek-speaking bishops in the eastern Roman world remained uncomfortable with it. The controversy therefore continued beyond the council’s formal decision.
Nicaea also defined the institutional position of Alexandria. Alongside Rome and Antioch, it received supervisory rights over suffragan bishops in its territory, and Alexandria became head of a diocese extending from the borders of Libya to the Nubian frontier. Constantine’s public embrace of the maimed ascetic bishop Paphnutius further symbolized imperial support for Egyptian monasticism.
4th century
Nicaea and the eastern Roman Church
The Council of Nicaea was an ecumenical council summoned by Constantine to address disputes dividing the Christian Church, especially the controversy surrounding Arius and the Meletian schism. Meeting from 20 May 325 for about a month, it condemned Arius and affirmed the formula that the Father and Son were “of the same substance.” It also formalized Alexandria’s supervisory authority over a vast Egyptian diocese.
Continue exploring
The Story
Constantine summoned the Council of Nicaea in early AD 325 after consolidating control over the Roman world. The assembly was intended to resolve the doctrinal conflict surrounding Arius, the Meletian schism, and other disputes affecting the Christian Church. It opened on 20 May and continued for approximately one month.
The council condemned Arius and his followers and adopted the formula that the Father and Son were “of the same substance,” or homoousios. This expression satisfied Christians who believed salvation required a fully divine Christ, although many Greek-speaking bishops in the eastern Roman world remained uncomfortable with it. The controversy therefore continued beyond the council’s formal decision.
Nicaea also defined the institutional position of Alexandria. Alongside Rome and Antioch, it received supervisory rights over suffragan bishops in its territory, and Alexandria became head of a diocese extending from the borders of Libya to the Nubian frontier. Constantine’s public embrace of the maimed ascetic bishop Paphnutius further symbolized imperial support for Egyptian monasticism.