J. S. Bach - Chorale-Prelude "Puer natus in Bethlehem" BWV 603 - YouTube

https://www.youtube.com/watch?v=6ljfEVj5ox0

from Orgel-Büchlein. Ton Koopman, Organ Orgel-Büchlein-Koopman playlist: http://www.youtube.com/view_play_list?p=2A9293BFC6A144D0