Ludwig van Beethoven’s thirty-two piano sonatas inherit the Classical sonata tradition while deepening individual expression and philosophical reflection, thereby forming a bridge to Romanticism. This thesis surveys the historical development of the...
Ludwig van Beethoven’s thirty-two piano sonatas inherit the Classical sonata tradition while deepening individual expression and philosophical reflection, thereby forming a bridge to Romanticism. This thesis surveys the historical development of the sonata genre and the stylistic features of Beethoven’s sonatas by period, and then focuses on Piano Sonata No. 32 in C minor, Op. 111, which represents the culmination of his late style. The purpose of the study is to elucidate the formal, harmonic, and expressive characteristics of Op. 111 and to clarify how this work transforms the conventional sonata idiom. First, drawing on previous research and historical literature, Beethoven’s piano sonatas are divided into four stages—Bonn period, early, middle, and late—and the changes in form, tonality, register, and expressive techniques in each period are outlined. The historical evolution of sonata form is then reviewed, from Classical sonata-allegro to Romantic and twentieth-century adaptations, in order to situate Op. 111 within a broader formal context. In the main analytical chapters, a detailed score analysis is carried out: in the first movement, the introduction, exposition, development, recapitulation, and coda are examined with regard to formal design, motivic relationships, harmonic progression, use of diminished seventh chords, and fugal writing; in the second movement, the theme, six variations, and coda are analyzed in terms of variation technique, rhythmic subdivision, texture, register, pedal points, and tempo and dynamic indications.
The analysis shows that the first movement of Op. 111 presents a transformed sonata-allegro form in which the introduction and main motives are organically related, and in which the use of diminished seventh chords, a Picardy third, fugal development, and an expanded coda reshapes the traditional pattern of tension and resolution. The second movement, a set of variations in C major on an “Arietta,” unfolds a meditative and transcendental atmosphere through its vocal-like melody, increasingly subdivided rhythms, wide registral span, and the use of pedal points and extended trills. The two movements share tonal, motivic, and rhythmic elements, achieving unity within contrast and exemplifying Beethoven’s late style—marked by inner reflection, formal experimentation, and a forward-looking Romantic idiom.
These findings provide practical insights for performers, enabling a more integrated understanding of formal structure, motivic coherence, tonal planning, and the role of register and pedal points in interpreting Op. 111.