Paul Wittgenstein (1887-1961) made significant contributions to the piano literature for the left hand through numerous commissioned works as well as his own transcriptions. In the transcriptions, Wittgenstein preserved the texture of two-hand music, aiming for the simulation of the original works. This requires special techniques in the performance by the left hand alone. This dissertation investigations technical means and performance problems associated with the transcriptions as well as Wittgenstein's own recordings of selections from his works. Chapter 1 serves as an introduction, providing a historical overview of the role of the left hand in two-hand piano literature. Chapter 2 gives biological information on Paul Wittgenstein and discusses the commissioned works. Chapter 3 investigates special techniques in the transcriptions, in the areas of arpeggios, widespread chords, fingering, pedaling, and others. Chapter 4 discusses Wittgensteins's performance style based on his recordings. Chapter 5 presents a conclusion pointing to the benefits of performing left-hand music in two-hand piano playing.

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