Catechism of the Catholic Church §870 — excerpt
"The sole Church of Christ which in the Creed we profess to be one, holy, catholic, and apostolic, . . subsists in the Catholic Church, which is governed by the successor of Peter and by the bishops in communion with him.
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.