Catechism of the Catholic Church §1061 — excerpt
The Creed, like the last book of the Bible, ends with the Hebrew word amen. This word frequently concludes prayers in the New Testament. the Church likewise ends her prayers with "Amen."
This translation is under copyright, so only the cited words are quoted here. Follow the link for the full text. Translation: English translation of the Catechism of the Catholic Church, 2nd ed. (Libreria Editrice Vaticana), as posted at vatican.va.