Church sonata in C

The autograph score of the Church Sonata in C Major, K. 329 bears no date, but it was written on paper of the same type as the Mass in C Major, K. 317, known as the Coronation Mass. Therefore, it seems likely that this festive sonata movement with trumpets, timpani, and an obbligato organ part that Mozart would have played himself was first performed on Easter Sunday (April 4), 1779.