Catechism of the Catholic Church §634 — excerpt
"The gospel was preached even to the dead." The descent into hell brings the Gospel message of salvation to complete fulfilment. This is the last phase of Jesus' messianic mission, a phase which is condensed in time but vast in its real significance: the spread…
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.