Mozart - Variations on a Minuet by Duport, K.573 (1789) Wolfgang Amadeus Mozart (27 January 1756 – 5 December 1791) was one of the most influential, popular and prolific composers of the classical period. A child prodigy, from an early age he began composing over 600 works, including some of the most famous pieces of symphonic, chamber, operatic, and choral music. Variations (9) on a minuet by D..