Piano Sonata No. 16 in C major, K. 545, is a well-known composition by Wolfgang Amadeus Mozart. Completed in 1788, it is often referred to as "Sonata facile" or "easy sonata" due to its accessible nature for beginner pianists. The piece consists of three movements: Allegro, Andante, and Rondo. The first movement, Allegro, features a lively and cheerful theme, while the second movement, Andante, offers a more lyrical and reflective character. The final movement, Rondo, brings back the playful spirit, showcasing Mozart's signature style and melodic inventiveness.