The late piano sonatas of Ludwig van Beethoven usually refer to the last five piano sonatas the composer composed during his late period. * Piano Sonata No. 28 in A major, Op. 101 * Piano Sonata No. 29 in B-flat major, Op. 106 "Hammerklavier" * Piano Sonata No. 30 in E major, Op. 109 * Piano Sonata No. 31 in A-flat major, Op. 110 * Piano Sonata No. 32 in C minor, Op. 111 Some compilations may include Piano Sonata No. 27 in E minor, Op. 90 as one of Beethoven's late piano sonatas.