where was christianity most strongly established by ad 325
History of early Christianity In the Ante-Nicene Period (literally before the First Council of Nicaea in 325), following the Apostolic Age, both incredible diversity and unifying characteristics lacking in the apostolic period emerged simultaneously.[citation needed] Part of the unifying trend was an increasingly harsh rejection of Judaism and of Jewish practices. By the beginning of the Nicene period, the Christian faith had spread throughout Western Europe and the Mediterranean Basin, and to North Africa and the East: see Early centers of Christianity. The Mediterranean Christianity journey consisted of 48 cities that St John visited to get the gentiles to join the Christian community.