- a formal statement of the chief tenets of Christian belief, adopted by the first Nicene Council.
- a later creed of closely similar form (Niceno-Constantinopolitan Creed, or Constantinopolitan Creed ) referred, perhaps erroneously, to the Council of Constantinople (a.d. 381), received universally in the Eastern Church and, with an addition introduced in the 6th century a.d., accepted generally throughout western Christendom.
- the formal summary of Christian beliefs promulgated at the first council of Nicaea in 325 ad
- a longer formulation of Christian beliefs authorized at the council of Constantinople in 381, and now used in most Christian liturgies
