The study of Jesus is central to Christianity. Christology studies Christ, his birth as "God with us" (Matthew 1:18-25), his resurrection, salvation in him and his two natures. Theologians see Jesus as both divine and human. Controversies over who Jesus was are not just modern news, but raged in the early centuries too. The Council of Chalcedon took place in 451 AD. It was the 4th Ecumenical Council and the last one that is widely recognized by Protestants. Its contributions to the Christian Church are perhaps the greatest consensus of opinions on Christology from church history. These are summarized in the 3rd great creed, the Chalcedonian Creed. In regard to Christ and Christology, the Chalcedonian Creed affirms the Trinity, Christ's virgin birth, his humanity and his deity, and the hypostatic union of his two natures in one person.