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Sonata in C major, No. 7, K. 309, I. Allegro
![First page of the score: Sonata in C major, No. 7, K. 309, I. Allegro · Wolfgang Amadeus Mozart (1756—1791) — Early edition · Mannheim: Götz, [1784]](https://i0.wp.com/leanoregillet.com/wp-content/uploads/2026/09/score-mozart-k309-gotz-1784.webp?fit=1500%2C2068&ssl=1)
History
Composed in 1777 during Mozart’s stay in Mannheim, the Piano Sonata in C major, K. 309 reflects the composer’s exposure to one of the most advanced musical environments of the time. The Mannheim court orchestra was renowned for its precision, dynamic contrasts, and expressive innovations, all of which left a strong imprint on Mozart’s writing.
This sonata is often associated with Mozart’s teaching activities, as it was likely written for the pianist Rosa Cannabich, daughter of the Mannheim orchestra’s conductor. The first movement combines brilliance and clarity with expressive depth, illustrating Mozart’s ability to merge pedagogical intent with genuine artistic ambition.
Structure
The first movement, Allegro, is written in sonata form. It opens with a confident and energetic principal theme, followed by a contrasting lyrical second theme that highlights balance and expressive phrasing. The development section explores harmonic variation and motivic transformation while maintaining clarity and momentum. The recapitulation restates the main material with refined symmetry, bringing the movement to a bright and well-proportioned conclusion characteristic of Mozart’s mature Classical style.
Original title
Klaviersonate in C-Dur, K. 309
In the Repertoire since
2024
Publicly performed