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'''Origen of Alexandria''' was a Christian of the early third century who was the first theologian to formulate a systematic system. He lived in a turbulent period for the Christian Church, a period of Roman persecutions and loose doctrinal consensus. He was a [[priest]], [[ordination|ordained]] under controversial conditions. His writings were extensive, much of which is not extant. In later centuries some extreme views by followers were attributed to him and his name was brought under suspicion. He was [[anathema]]tized by the [[Fifth Ecumenical Council|Second Council of Constantinople]] in 553 and declared a [[heretic]].