After the Council of Chalcedon in 451, many Syriac Christians within the Roman Empire rebelled against its decisions. The Patriarchate of Antioch was then divided between a Chalcedonian and non-Chalcedonian communion. The Chalcedonians were often labelled 'Melkites' (Emperor's Party), while their opponents were labelled as Monophysites (those who believe in the one rather than two natures of Christ) and Jacobites (after Jacob Baradaeus).