This is the beautiful theme from the first movement of Piano Sonata No. 11, K. 311 by Wolfgang Amadeus Mozart (1756- 1791).   The movement is in the form of theme and six variations.    The third and final movement from Piano Sonata No. 11 is perhaps one of Mozart’s most famous—the Rondo Alla Turca also known as the Turkish March since it imitates the sound of Turkish bands popular at the time.