9 in B-flat major by Wolfgang Amadeus Mozart, K. 275/272b, was probably written before September 1777 for Salzburg.

In the Gloria and the Credo, Mozart eschews the traditional concluding fugues.

[1] Despite being a missa brevis, the Agnus Dei is very long and there is "a prolonged setting for soloists and choir of 'Dona nobis pacem', ending piano.

"[1] The Dona nobis is set as a gavotte, "like a vaudeville and has been compared with the specimen of this genre at the end of Die Entführung aus dem Serail.

Elsewhere church musicians were offended, such as those at Wasserburg am Inn, who found Mozart's setting "an open mockery of the holy text.