Catechism of the Catholic Church §2619 — excerpt
That is why the Canticle of Mary, The Magnificat (Latin) or Megalynei (byzantine) is the song both of the Mother of God and of the Church; the song of the Daughter of Zion and of the new People of God; the song of thanksgiving for…
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.