Wolfgang Amadeus Mozart (1756-1791).
The Piano Sonata No. 11 in A major, K. 331, by Wolfgang Amadeus Mozart is a piano sonata in three movements. It is uncertain where and when Mozart composed the sonata; however, Vienna or Salzburg around 1783 is currently thought to be most likely (Paris and dates as far back as 1778 have also been suggested). The sonata was published by Artaria in 1784, alongside Nos. 10 and 12 (K. 330 and K. 332).
Mozart's music, like Haydn's, stands as an archetype of the Classical style. At the time he began composing, European music was dominated by the style galant, a reaction against the highly evolved intricacy of the Baroque. In large part at the hands of Mozart himself, the contrapuntal complexities of the late Baroque emerged once more, moderated and disciplined by new forms, and adapted to a new aesthetic and social milieu.
Mozart was a versatile composer, and wrote in every major genre, including symphony, opera, the solo concerto, chamber music including string quartet and string quintet, and the piano sonata. These forms were not new, but Mozart advanced their technical sophistication and emotional reach. He almost single-handedly developed and popularised the Classical piano concerto.