Mozart's Twelfth Mass, K. Anh. 232 Mozart's Twelfth Mass, K. Anh. 232 Mozart's Twelfth Mass, once a top seller among the liturgical compositions published by Vincent Novello in the 19th century, is a work no longer attributed to Wolfgang Amadeus Mozart. Köchel rejected the attribution to Mozart in the Anhang (appendix) of the first edition of his catalogue of Mozart's works, there listed as K. Anh. 232, and in later editions as K. Anh. C1.04. The mass was published in 1819 as No. 12 in Novello's series of masses by Mozart, which is the origin of its name. Simrock was the first to publish the mass
The Smith of Kochel known as "Balthasar" with a last name of either "Mayer" or "Riesenberger". A "Balthasar Mayer" (born January 6, 1644 in Waalkirchen) actually existed, but no evidence of this person being a smith in Kochel could be found. A "Balthasar Riesenberger" (born in Bach bei Holzolling) took part in the battle in Sendling, but no evidence of his being a smith in Kochel could be found either. The fact that Kochel belonged to the court district of Murnau at the time of the revolt, which did not take part in the Oberländer rebellion, also speaks against the Kochel theory. In memory