Mozart Completes Symphony No. 39
The 39th Symphony is the first of a set of three (his last symphonies) that Mozart composed in rapid succession during the summer of 1788.
No. 40 was completed 25 July and No. 41 on 10 August. Around the same time, Mozart was writing his piano trios in E and C major, his sonate facile, and a violin sonatina. Mozart biographer Alfred Einstein has suggested that Mozart took Michael Haydn's Symphony No. 26, in the same key, as a model.
It seems to be impossible to determine the date of the premiere of the 39th Symphony on the basis of currently available evidence; in fact, it cannot be established whether the symphony was ever performed in the composer's lifetime.