Wolfgang Amadeus Mozart full name Johann Chrysostom Wolfgang Amadeus Mozart (27 January 1756 5 December 1791) was a prolific and influential composer of the Classical era. His over 600 compositions include works widely acknowledged as pinnacles of symphonic; concertante; chamber; piano; operatic; and choral music.Mozart is among the most enduringly popular of classical composers; and many of his works are part of the standard concert repertoire. Twelve Variations on "Ah vous dirai-je, Maman", K. 265/300e, is a piano composition by Wolfgang Amadeus Mozart, composed when he was around 25 years old (1781 or 1782). This piece consists of twelve variations on the French folk song Ah! vous dirai-je, Maman. The French melody first appeared in 1761, and has been used for many children's songs, such as Twinkle Twinkle Little Star, Baa, Baa, Black Sheep and the Alphabet Song.Wolfgang Amadeus Mozart full name Johann Chrysostom Wolfgang Amadeus Mozart (27 January 1756 5 December 1791) was a prolific and influential composer of the Classical era. His over 600 compositions include works widely acknowledged as pinnacles of symphonic; concertante; chamber; piano;.