Paul Wittgenstein (November 5, 1887 – March 3, 1961) was an Austrian-born Jewish American concert pianist, who became known for his ability to play with just his left hand, after he lost his right arm during the First World War. He devised novel techniques, including pedal and hand-movement combinations, that allowed him to play chords previously regarded as impossible for a five-fingered pianist. He commissioned several pieces for the left hand from prominent composers, including Richard Strauss, Erich Wolfgang Korngold, Paul Hindemith, Sergei Prokofiev, Maurice Ravel and, later, Benjamin Britten.