Monophysitism or monophysism is a Christological doctrine that states that there was only one nature—the divine—in the person of Jesus Christ, who was the incarnated Word. It is rejected as heretical by the Catholic Church, Eastern Orthodox Church, Anglicanism, Lutheranism, Reformed Christianity (Calvinist), and all mainstream Protestant denominations, which hold to the dyophysitism of the 451 Council of Chalcedon –as well by Oriental Orthodoxy, which holds to miaphysitism.