Symphony No. 39 is one of the final symphonies composed by Wolfgang Amadeus Mozart in 1788. It is notable for its rich orchestration and emotional depth, showcasing Mozart's mastery of the symphonic form. The symphony is written in four movements, with the first movement, Allegro, being particularly celebrated for its energetic themes. The work is part of a trilogy of symphonies, including Symphony No. 40 and Symphony No. 41, all composed in a short span. Symphony No. 39 is often praised for its innovative use of harmony and structure, reflecting the transition from the Classical to the Romantic era in music.