Magnificat

Thomas Tallis' "Magnificat" The Magnificat (Latin: [My soul] magnifies) — also known as the Song of Mary or the Canticle of Mary — is a canticle frequently sung (or spoken) liturgically in Christian church services. It is one of the eight most ancient Christian hymns and perhaps the earliest Marian hymn. Its name comes from the first word of the Latin version of the canticle's text. The text of the canticle is taken directly from the Gospel of Luke (Luke 1:46-55) where it is spoken by the Virgin Mary upon the occasion of her Visitation to her cousin Elizabeth. In the narrative, after Mary greets Elizabeth, who is pregnant with the future John the Baptist, the child moves within Elizabeth's womb. When Elizabeth praises Mary for her faith, Mary sings what is now known as the Magnificat in response. -from http://en.wikipedia.org/wiki/Magnificat