The Piano Sonata in G major D. 894, Op. 78 by Franz Schubert is a sonata for solo piano, completed in October 1826.[1] The work is sometimes called the "Fantasie", a title which the publisher Tobias Haslinger, rather than Schubert, gave to the first movement of the work.[2] It was the last of Schubert's sonatas published during his lifetime, and was later described by Robert Schumann as the "most perfect in form and conception" of any of Schubert's sonatas.[3] A typical performance runs approximately 35 minutes.
The autograph manuscript of the sonata is preserved in the British Library.