A song I discovered a few years back and then remembered a few days ago is Zu Bethlehem Geboren which I think may be German and translated, I think, In Bethlehem Born. Very nice melody but since I have only heard two vocal versions and both are in German I have no clue as to the lyrics. Have heard several instrumental versions which I liked. I did a little research and it appears the song goes back to the 17th century. Have no idea how widely circulated the piece may be.