Piano Concerto No. 20 (Mozart)
III. The last movement returns to D minor. (Allegro assai; alla breve), and is one of Mozart's rare rondos in a minor key. The movement is written in an extended sonata-rondo form (ABACDA, with a coda). C is a development with the reprise in D. The development strays to G minor, but D major brings the movement to its close.