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.
Council of Jerusalem The Council of Jerusalem or Apostolic Council was held in Jerusalem around AD 50. It is unique among the ancient pre-ecumenical councils in that it is considered by Catholics and Orthodox to be a prototype and forerunner of the later ecumenical councils and a key part of Christian ethics. The council decided that Gentile converts to Christianity were not obligated to keep most of the Law of Moses, including the rules concerning circumcision of males. The Council did, however, retain the prohibitions on eating blood, meat containing blood, and meat of animals not properly slain, and on fornication and idolatry, sometimes referred to as the Apostolic Decree or Jerusalem Quadrilateral.