Kyrie–Gloria Mass for double choir, BWV Anh. 167
The Kyrie–Gloria Mass for double choir, BWV Anh. 167, is a mass composition in G major by an unknown composer. The work was likely composed in the last quarter of the 17th century. The composition has two sections, a Kyrie and a Gloria, each subdivided in three movements. It has twenty-two parts for performers: twelve parts for singers, and ten for instrumentalists, including strings, wind instruments and organ. Johann Sebastian Bach may have encountered the work around 1710, when he was employed in Weimar. In the 1730s he produced a manuscript copy of the Mass.
The Mass played an important role in Bach reception of the early 19th century; at the time it was published and performed as one of the composer's significant works. Scholarship published in the second half of the 19th century contested the work's attribution to Bach, proposing Antonio Lotti, or alternatively Johann Ludwig Bach, as possible composer of the work. In the 20th-century Bach-Werke-Verzeichnis (BWV; lit. 'Bach Works Catalogue'), it was initially listed as a composition spuriously attributed to Bach, while later being classified as a doubtful composition by the composer. The work was recorded in the 21st century, and, in scholarship, Christoph Bernhard, Johann Philipp Krieger or David Pohle were mentioned as its possible composer.