 The tour thus saw Wolfgang's transformation from a composer of simple keyboard pieces to one with increasing mastery over a range of genres.This was evidenced in his home city, on 8 December, when one of his symphonies (it is uncertain which) was performed at High Mass at Salzburg Cathedral.Leopold's employer, the Prince-Archbishop, was frankly sceptical about Wolfgang's compositions, believing them to be Leopold's because they were "not nearly bad enough to be the work of a child".