Analysis of information sources in references of the Wikipedia article "Early Christianity" in English language version.
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Friedländer put forth the thesis that Gnosticism is a pre-Christian phenomenon which originated in antinomian circles in the Jewish community of Alexandria.
Though Egypt undoubtedly is one of the oldest centres of gnosticism, it can not be called the country of its origin. This privilege could with more right be claimed by Syria or by Iran.
Ancient Gnosticism and the beginnings of Alexandrian Christianity are closely connected [...] gnostic teachers played an important part in at least some groups of Alexandrian Christians and [...] their ideas were influential in the formation of an early Alexandrian theology.
Gnostic Christian teachers had ties to Alexandria, which had an extensive, educated, and pluralistic Jewish community.
In the early 21st century the church claimed more than 30 million adherents in Ethiopia.
...[the] Church founded and organized at Rome by the two most glorious apostles, Peter and Paul; as also [by pointing out] the faith preached to men, which comes down to our time by means of the successions of the bishops. ...The blessed apostles, then, having founded and built up the Church, committed into the hands of Linus the office of the episcopate.
Orthodox 32,138,126
Contact with Grecian life, especially at the games of the arena [which involved nudity], made this distinction obnoxious to the Hellenists, or antinationalists; and the consequence was their attempt to appear like the Greeks by epispasm ("making themselves foreskins"; I Macc. i. 15; Josephus, "Ant." xii. 5, § 1; Assumptio Mosis, viii.; I Cor. vii. 18; Tosef., Shab. xv. 9; Yeb. 72a, b; Yer. Peah i. 16b; Yeb. viii. 9a). All the more did the law-observing Jews defy the edict of Antiochus Epiphanes prohibiting circumcision (I Macc. i. 48, 60; ii. 46); and the Jewish women showed their loyalty to the Law, even at the risk of their lives, by themselves circumcising their sons.
We are Christians by the one name of the Messiah. As regards our customs our brethren abstain from everything that is contrary to their profession.... Parthian Christians do not take two wives.... Our Bactrian sisters do not practice promiscuity with strangers. Persians do not take their daughters to wife. Medes do not desert their dying relations or bury them alive. Christians in Edessa do not kill their wives or sisters who commit fornication but keep them apart and commit them to the judgement of God. Christians in Hatra do not stone thieves.
Ethiopian Orthodox Tewahedo Church has an estimated 36 million adherents, nearly 14% of the world's total Orthodox population.
Orthodox 32,138,126
We are Christians by the one name of the Messiah. As regards our customs our brethren abstain from everything that is contrary to their profession.... Parthian Christians do not take two wives.... Our Bactrian sisters do not practice promiscuity with strangers. Persians do not take their daughters to wife. Medes do not desert their dying relations or bury them alive. Christians in Edessa do not kill their wives or sisters who commit fornication but keep them apart and commit them to the judgement of God. Christians in Hatra do not stone thieves.