'''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 the twelve great piano concertos written in Vienna between 1784 and 1786.
The K. 503 concerto has long been neglected in favor of Mozart's more "brilliant" concertos, such as K. 467. Though Mozart performed it on several occasions, it was not performed again in Vienna until after his death, and it only gained acceptance in the standard repertoire in the later part of the twentieth century.[http://kennedycenter.com/calendar/index.cfm?fuseaction=composition&composition_id=2373 Kennedy Center program notes: Piano Concerto No. 25 in C major, K. 503] Mozart's pupil Johann Nepomuk Hummel valued it, as can be seen in the influence it had on Hummel's own Piano Concerto in C, Op. 36.