In dulci jubilo

The 14th-century German tune, In dulci jubilo, was probably originally a folk dance melody. It is reputed to have been written by medieval mystic Heinrich Seuse in response to a vision of Angels who sang and invited him to dance. Nowadays, it is used most often for the Christmas carol, Good Christians, All Rejoice. Use this version as written, or pick and choose the verse settings which work best for your situation or group! 

search terms: Maiden, Müller, Mueller, Maiden Müller, Maiden Mueller, Maiden-Müller, or Maiden-Mueller