Sonata in C Major, K. 545 - Wolfgang Amadeus Mozart

Sonata in C Major, K. 545, composed by Wolfgang Amadeus Mozart in 1788, is one of the most beloved piano pieces around the world. This piece has achieved a legendary status among classical music lovers, and amateurs and professionals alike, who appreciate its beautiful melodies combined with its relative technical simplicity.

History and Release of the Piece

Sonata in C Major, K. 545 was written in the summer of 1788, when Mozart was 32 years old. Mozart himself did not dedicate it to anyone; however, it has become known as the 'Sonata facile' (easy sonata) in contrast with his later works, due to its accessible level of technical difficulty. This piece has been popular since its release and remains a beloved classic.

The Sonata is generally thought to be a musical representation of Mozart's joy at the birth of his son, Theodor, in June 1788. This is evident in the piece's overall cheerful and cheerful tone. It consists of three movements: a fast allegro in sonata form, a lyrical andante and a simple rondo finale.

Simplified Analysis of the Composition

This work is in sonata form and composed in the key of C major. The structure of the piece is laid out as a conventional sonata form. The main theme is first presented in the first movement and is then developed further in the second and third movements. The first movement is a fast allegro with a quick tempo, while the second and third movement are slower and more lyrical.

The overall structure makes the piece appealing to listeners, as it has a clear development of themes, but also touches upon the emotions of the listener. Throughout the piece, there is a consistent harmonic progress that allows the listener to follow the piece easily.

Why is the Piece so Popular?

The piece is popular for its accessibility for performers of all levels, as well as its lyrical, emotive melodies and its simple, yet effective harmonic progressions. The piece is also well suited for background music and as an accompaniment for romantic occasions, due to its lyrical nature and rhythmic drive.

Furthermore, due to its technical simplicity, it makes a great piece for beginner students of the piano, as the study of this piece can help to develop the student's skills.


Wolfgang Amadeus Mozart's Sonata in C Major, K. 545, is a terrific piece that has stood the test of time, and continues to be fiercely loved by musicians of all levels. As it is easy to learn, but still allows performers to express their own emotions, the "Sonata Facile" undoubtedly belongs in the annals of history as one of the great piano pieces.

Publication date: 22. 02. 2023