In 325 CE Constantine summoned some 250-300 bishops to Nicaea to settle whether the Son was a created being, as the presbyter Arius taught.
Imported citation, not independently checked: Eusebius, Life of Constantine; L. Ayres, Nicaea and its Legacy
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What Actually Happened at the Council of Nicaea (325)?
What Actually Happened at the Council of Nicaea (325)?
The current answer
A small council, a contested word, and the myths that grew around it.
What remains uncertain
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The council rejected Arius and adopted a creed calling the Son homoousios ("one substance") with the Father.
Imported citation, not independently checked: Nicene Creed (325)
Nobody at Nicaea argued Jesus was an ordinary man.
Imported citation, not independently checked: Athanasius, Orations against the Arians
Calling 325 the moment the doctrine was "finalized" is the kind of compression that makes good drama and bad history (Pelikan, The Christian Tradition, vol. 1, 1971).
Imported citation, not independently checked: J. Pelikan, The Christian Tradition, vol. 1 (1971)
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