The Piano Sonata No. 16 in C major, K. 545, by Wolfgang Amadeus Mozart was described by Mozart in his own thematic catalogue as "for beginners", and it is very commonly known by the nickname Sonata facile or Sonata semplice. Despite this, the sonata is actually not an easy work to perform and can hardly be described as "for beginners." Mozart added the work to his catalogue on June 26, 1788, the s... Wikipedia