The Explorers' Club, № MCVII

Operation AXIOM: The 1,700th Anniversary of the First Council of Nicaea
20 May-25 August 325: The first ecumenical council was summoned by the Emperor Constantine to settle a dispute over the divinity & nature of Jesus Christ; a priest named Arius taught that Jesus was not co-eternal with God the Father, but was a created being; the council wrote the Nicene Creed to clarify Christian belief in Christ's divinity & co-eternity; Arius's errors were declared anathema.

Commentary: The original Nicene Creed was only to reaffirm the Divinity of Christ; the Creed was revised by the second ecumenical council, the First Council of Constantinople (381), to reaffirm the Trinity. The Creed as currently recited by Christians is formally the Niceno-Constantinopolitan Creed.

'Twas at Nicaea that Saint Nicholas, the Bishop of Myra, eventually mythologized as Santa Claus, is reputed to have slapped, or punched, the archheretic Arius.

The Wayback Machine Tour of the Arian Heresy
"The Explorers' Club," № CCCLXVII: The Arian Heresy, Part I
"The Explorers' Club," № CCCLXVIII: The Arian Heresy, Part II
"The Explorers' Club," № CCCLXIX: The Arian Heresy, Part III

Semper exploro.