Catechism of the Catholic Church §701 — excerpt
The dove. At the end of the flood, whose symbolism refers to Baptism, a dove released by Noah returns with a fresh olive-tree branch in its beak as a sign that the earth was again habitable.
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.
Also cites: parallels