who was involved in the council of nicaea
First Council of Nicaea The First Council of Nicaea (/naɪˈsiːə/; Greek: Νίκαια [ˈni:kaɪja]) was a council of Christian bishops convened in the Bithynian city of Nicaea (now İznik, Bursa province, Turkey) by the Roman Emperor Constantine I in AD 325. Constantine I organized the Council along the lines of the Roman Senate and presided over it, but did not cast any official vote.