The Nicene Creed is a statement of belief widely used in Christian liturgy. It is called Nicene because it was originally adopted in the city of Nicaea (present day İznik, Turkey) by the First Council of Nicaea in 325.

We believe in one God,
      the Father almighty,
      maker of heaven and earth,
      of all things visible and invisible.

And in one Lord Jesus Christ,
      the only Son of God,
      begotten from the Father before all ages,
           God from God,
           Light from Light,
           true God from true God,
      begotten, not made;
      of the same essence as the Father.
      Through him all things were made.
      For us and for our salvation
           he came down from heaven;
           he became incarnate by the Holy Spirit and the virgin Mary,
           and was made human.
           He was crucified for us under Pontius Pilate;
           he suffered and was buried.
           The third day he rose again, according to the Scriptures.
           He ascended to heaven
           and is seated at the right hand of the Father.
           He will come again with glory
           to judge the living and the dead.
           His kingdom will never end.

And we believe in the Holy Spirit,
      the Lord, the giver of life.
      He proceeds from the Father and the Son,
      and with the Father and the Son is worshiped and glorified.
      He spoke through the prophets.
      We believe in one holy catholic and apostolic church.
      We affirm one baptism for the forgiveness of sins.
      We look forward to the resurrection of the dead,
      and to life in the world to come. Amen.

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The Nicene Creed (325-381 A.D.) provides a fuller explanation of the Christian faith. It is called Nicene because a general council of the church, similar to Vatican II held in the 1960s, met in the city of Nicaea in Asia Minor. The Council was called to deal with the heresy of Arianism, which was a denial of the Trinity. The Nicene Creed goes into more detail than the Apostles' Creed on the Trinity and the person of Jesus.

A final version of the creed was formulated by another Council which met in Constantinople in 381 A.D. The creed is and has been from the start a topic of contention. In 598 a provincial church council meeting in Toledo, Spain, added the "filioque clause" which says that the Holy Spirit proceeded from the Father "and the Son." This added clause was accepted by the Western but not the Eastern church. It became one of the causes of the schism between East and West in 1064 A.D. Today the clause is still proving to be a stumbling block to closer relations with the Eastern Orthodox church. The Nicene Creed is familiar to most churchgoers in liturgical churches, because it is used in the worship service on festivals and certain seasons such as Advent, Christmas, Lent, and Easter.