In 451, the Council of Chalcedon, the fourth ecumenical council, condemned Monophysitism, and also rejected Dyoprosopism. This council was rejected by the Oriental Orthodox Churches, one of which is the Syriac Orthodox Church, that uses the West Syriac Rite. The Patriarchate of Antioch was consequently divided between two communities, pro-Chalcedonian and non-Chalcedonian. The Chalcedonians were often labelled as 'Melkites' (Imperials), while their opponents were labelled Monophysites (those who believe in the one rather than two natures of Christ) and Jacobites (after Jacob Baradaeus).