The '''Nicene-Constantinopolitan Creed''' (also called the '''Nicene Creed''', the '''Symbol of Faith''', or simply the '''Creed''') is that creed formulated at the [[First Ecumenical Council|First]] and [[Second Ecumenical Council|Second]] [[Ecumenical Councils]]. It was defined by the [[Church Fathers|Holy Fathers]] of those first two councils (held in Nicea and Constantinople, respectively) to combat various [[heresy|heresies]], notably [[Arianism]], [[Appolinarianism]], [[Macedonianism]] (also called [[Pneumatomachianism]]), and [[Chiliasm]].

The Creed as it now stands was formed in two stages, and the one in use today in the [[Orthodox Church]] reflects the revisions and additions made at the [[Second Ecumenical Council]]. Some centuries later, the [[Roman Catholic Church]] attempted a unilateral revision of the Creed by the addition of the [[Filioque]], thus being one of the causes of the [[Great Schism]] between Rome and the rest of the Church.