The Symphony No. 5 in B-flat major, K. 22, was composed by Wolfgang Amadeus Mozart in The Hague in 1765, at the age of nine, while he was on his grand musical tour of Western Europe. The symphony is cast in the standard three-movement Italianate form: Allegro, Andante, Allegro molto.
All three movements are colored especially prominently by horns. A rousing first movement in B-flat major opens the symphony, followed by a more solemn, mournful movement in G minor. A short, boisterous finale closes the work. The opening theme to the finale is notable because the exact same theme appears in a much later, more mature work of Mozart’s: the Act 2 Finale of his 1786 opera buffa, Le nozze di Figaro, K. 492.