The Nicene-Constantinopolitan Creed, often simply referred to as the Nicene Creed, is a statement of Christian faith that emerged from the First Council of Nicaea in 325 AD and was later reaffirmed at the First Council of Constantinople in 381 AD. This creed was significant in establishing core Christian beliefs, particularly concerning the nature of God, Christ, and the Holy Spirit, while countering various heretical views that threatened early Christian doctrine.