The Son is created

Doctrine · On God · c. 318–381

The Son is a creature, made out of nothing before all ages, and there was when he was not.

The proposition Nicaea set aside in the clauses appended to its creed. It was not a fringe opinion when it was made: the sixty years after Nicaea saw it defended by councils, emperors and much of the Eastern episcopate.

Held it

318 — Arius (Holds). Teaches that the Son is a creature, made out of nothing, and that there was when he was not. Attributed by the First Council of Nicaea. The Seven Ecumenical Councils (NPNF series 2 vol. 14) · Nicaea I (325), the anathemas appended to the creed

Refused it

325 — The First Council of Nicaea (Anathematizes). Anathematizes those who say there was when he was not, and that he was made out of things that are not. The Seven Ecumenical Councils (NPNF series 2 vol. 14) · Nicaea I (325), the anathemas appended to the creed
339 — Athanasius of Alexandria (Rejects). Argues that a created Son cannot deify, so that the whole account of salvation stands or falls with the term. New Advent (Fathers and Catholic Encyclopedia) · Athanasius, Orations against the Arians 1.9
381 — The First Council of Constantinople (Anathematizes). Sets it aside by name among the parties the council rejects. The Seven Ecumenical Councils (NPNF series 2 vol. 14) · Constantinople I (381), canon 1

In the disputes

The Arian crisis Sixty years of argument about whether the Son is God in the same sense the Father is.

First stated in this form after The Seven Ecumenical Councils (NPNF series 2 vol. 14) · Nicaea I (325), the anathemas appended to the creed.