Piano Concerto No. 25 (Mozart) Donald Tovey, Cuthbert Girdlestone, and Alfred Einstein as among the musicologists who uphold K. 503 as exemplary. Piano Concerto No. 25 (Mozart) The Piano Concerto No. 25 in C major, K. 503, was completed by Wolfgang Amadeus Mozart on December 4, 1786, alongside the Prague Symphony, K. 504. Although two more concertos (K. 537 and K. 595) would later follow, this work is the last of what are considered the twelve great piano concertos written in Vienna between 1784 and 1786. Chronologically the work is the 21st of Mozart's 23 original piano concertos. K. 503 is now widely recognized as
Wolfgang Amadeus Mozart listeners and performers. These developments were not witnessed by Mozart's father, who had died on 28 May 1787. In December 1787, Mozart finally obtained a steady post under aristocratic patronage. Emperor Joseph II appointed him as his "chamber composer", a post that had fallen vacant the previous month on the death of Gluck. It was a part-time appointment, paying just 800 florins per year, and required Mozart only to compose dances for the annual balls in the Redoutensaal (see "Mozart and dance"). This modest income became important to Mozart when hard times arrived. Court records show that Joseph's aim was