Allegretto in B flat major, WoO 39

The Allegretto for Piano Trio, WoO 39, in B♭ major is a composition for piano trio by Ludwig van Beethoven that was composed in 1812 as a gift for Maximiliane Brentano, the then ten-year-old daughter of his friend Antonie Brentano. Eight years later he also dedicated the Piano Sonata Op. 109 to Maximiliane. The composition was first published in 1830 by F. P. Dunst in Frankfurt, along with the Piano Trio in E♭ major, WoO 38, and the Piano Sonata in C major, WoO 51.