Mozart's Symphony No. 40: Emotional intensity in Sturm und Drang style.

Wolfgang Amadeus Mozart completed his Symphony No. 40 in G minor, K. 550, in Vienna, during a concentrated period of composition that also produced his final two symphonies. Mozart had finished Symphony No. 39 in E-flat major, K. 543 on 26/06/1788, and would complete Symphony No. 41 in C major, K. 551 on 10/08/1788. These three works were written within roughly six weeks. Symphony No. 40 stands out among them as one of only two symphonies Mozart composed in a minor key, the other being Symphony No. 25 in G minor from 1773. The opening movement departs from the conventional orchestral introduction typical of many late eighteenth century symphonies. Instead, muted lower strings begin with a soft, pulsing accompaniment under a restless violin theme. The movement features frequent dynamic contrasts, chromatic lines, and tightly structured motivic development. The symphony is scored for strings, woodwinds, and horns, with Mozart later revising the instrumentation to include clarinets in a second version. The second movement shifts to E-flat major, followed by a minuet in G minor with a contrasting trio in G major. The final movement returns to G minor with rapid thematic exchanges and dense contrapuntal writing. The work has often been associated with stylistic traits linked to the Sturm und Drang aesthetic, including heightened tension, minor key emphasis, and expressive contrast. Mozart’s use of G minor appears in several of his more dramatic compositions, including the Piano Quartet in G minor, K. 478, and Symphony No. 25. The symphony was written during a period in 1788 when Mozart documented financial difficulties and sought new subscriptions for concerts. The summer also followed personal strain within his household, including the death of his infant daughter earlier that year. Although no surviving document directly connects these circumstances to the symphony, the composition dates coincide with this period. Why This Moment Matters The completion Symphony No. 40 within Mozart’s final trilogy of symphonies, written in rapid succession, with the G minor work providing the only minor key entry among them.