Catechism of the Catholic Church §2141 — excerpt
The veneration of sacred images is based on the mystery of the Incarnation of the Word of God. It is not contrary to the first commandment.
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.