Kantate zum Weihnachtsfest. Par BACH JOHANN SEBASTIAN. The Christmas cantata Gloria in excelsis Deo BWV 191, which has always presented researchers with many challenging problems, is among the few works to Latin words set by Johann Sebastian Bach. It consists of three sections - a finely-woven duet flanked by two festive choral movements - which we are to encounter again almost note for note in the world-famous Mass in B minor./ Répertoire / Score