First Council of Nicaea
325 · Nicaea (İznik), Anatolia
- Convened by
- The Emperor Constantine
- What was at stake
- Is the Son a creature, or of the very substance of the Father? Arius held that the Son was the first of created beings.
- What it decided
- The framing of the creed and the affirmation that the Son is “of one substance with the Father”. Athanasius of Alexandria was among the foremost defenders of that formula.
Accepted by
Every church, without exception.