Gregory of Nyssa (335-395), was bishop of Nyssa and he is venerated as a saint in the Christian Church. Gregory, his elder brother Basil of Caesarea, and their friend Gregory of Nazianzus are collectively known as the Cappadocian Fathers. Gregory was an erudite theologian who made significant contributions to the doctrine of the Trinity and the Nicene Creed. Gregory's philosophical writings were influenced by Origen.