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 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.
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