These two sonatas in C major (KV 545) and A major (KV 331) are among the most popular of all Mozart's piano sonatas. KV 545 is a firm favourite with piano teachers and their pupils (for many pianists it is their first introduction to the sonata repertoire) and KV 331 with its famous variation movement and the renowned Rondo alla turca is one of the most popular works of the whole Viennese classical period.