Piano Sonata no. 17 in D major, D.850, op. 53, "Gasteiner"

Franz Schubert's Piano Sonata in D major D. 850, Op. 53, known as the Gasteiner, was written during August 1825 while the composer was staying in the spa town of Bad Gastein. A year later, it became only the second of his piano sonatas to be published.