Msgr. Pope: For my money, the best Advent hymn ever is Veni Redemptor Gentium (Come Redeemer of the Nations), written by St. Ambrose in the 4th century. It is more widely known by the title “Come Thou Redeemer of the Earth.” Sadly, it is not often sung in Catholic parishes today. Most Catholics I’ve asked have never even heard of it. Read here and listen to the hymn.