An insteresting case of self-borrowing. Bach took music from this work for his own Mass in B-minor ( Part 1 corresponds to the Gloria in excelsis Deo, Part 2 to the Domine Deus, Part 3 to the Cum sancto spiritu). This unusual cantata, the only one with a Latin text, may have been written to celebrate the Peace of Dresden (which ended the 2nd Silesian war) and first performed on Christmas day of 1745. This newly engraved, carefully edited vocal score is based on the Bach Gessellschaft edition. The convenient A4 size is ideal for vocalists, choruses, and rehearsal pianists. Matches the widely available reprint orchestral parts offered by E. F. Kalmus (A7520) and Luck's Music Library (02286). IMSLP page Wikipedia | Gloria in Excelsis Deo BWV 191 by Johann Sebastian Bach, Paperback | Indigo Chapters