The work was composed during a journey to Mannheim and Paris in 1777-78. The sonata was completed in a few days in early November 1777. The andante movement is a "portrait" of his pupil Rose Cannabich, the 13-year-old daughter of the Mannheim Kapellmeister Christian Cannabich. Upon reviewing a copy of the manuscript, Mozart's father Leopold wrote that it was "a strange composition. It has something in it of the 'rather artificial' Mannheim style, but so very little that your own good style is not spoilt".

Date of composition 1777
Type Sonata
Tonality C Major
Catalogue KV 309
Instruments Piano
In listings Famous Works
Autotranslations beta Wolfgang Amadeus Mozart: Sonate pour piano n°7 en do majeur, KV 309
Wolfgang Amadeus Mozart: Sonata per pianoforte n. 7 in do maggiore, KV 309
Wolfgang Amadeus Mozart: Sonate Nr. 7 für Klavier C-dur, KV 309