Ecumenical Council (431) affirmed the teaching of "One Person" of Jesus Christ, condemning all other teachings. The Fourth Ecumenical Council (451) reaffirmed the notion of One Person of Jesus Christ, formulating the famous Chalcedonian Definition with its "monoprosopic" (having one person) clauses, and in the same time explicitly denying the validity of "dyoprosopic" (having two persons) views. See also Person of Christ Nestorianism References Sources Christian philosophy Christology Trinitarianism Nature of Jesus Christ Personhood New Testament Greek words and phrases