 German songs for Advent include "Es kommt ein Schiff, geladen" from the 15th century and "O Heiland, reiß die Himmel auf", published in 1622.Johann Sebastian Bach composed several cantatas for Advent in Weimar, from "Nun komm, der Heiden Heiland", BWV 61, to "Herz und Mund und Tat und Leben", BWV 147a, but only one more in Leipzig where he worked for the longest time, because there Advent was a silent time which allowed cantata music only on the first of the four Sundays.During Advent, the Gloria of the Mass is omitted, so that the return of the angels' song at Christmas has an effect of novelty.