Credo

The Credo () is part of Christian Mass. "Credo" is Latin, and means "I believe". It is a statement of faith. In Catholicism, the Nicene Creed is used very often; but there are others, such as the Athanasian Creed or Apostles' Creed.
Very often it is sung by the crowd, or by a choir; many people have written credoes. One of them is Antonio Vivaldi