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.
Title page of the 1805 edition of the Missa, BWV Anh. 167 – then attributed to Johann Sebastian Bach.
St Jacob's Church in Weimar [de], where the Mass BWV Anh. 167 may have been performed under Johann Sebastian Bach's direction in 1713.
Missa brevis usually refers to a mass composition that is short because part of the text of the Mass ordinary that is usually set to music in a full mass is left out, or because its execution time is relatively short.
Start of Gaspar van Weerbeke's Missa brevis in Choirbook, D-Ju MS 21
Start of the Kyrie of Johann Sebastian Bach's Mass in B minor, originally composed as the start of a Kyrie–Gloria Mass in B minor dedicated to Frederick Augustus II, Elector of Saxony, when he came to power in 1733. The original Kyrie–Gloria mass was composed in 12 movements for SSATB soloists and choir, and an extensive baroque orchestra. It was probably because of its long duration that the score was archived in the Royal Library upon arrival in Dresden, instead of being added to the repertoire of the Catholic Hofkirche.