Chopin’s Third Piano Sonata, Op. 58, is the largest solo work of his late period. Chopin’s successful combination of the Classical and the Romantic aesthetic, which is explored in Chapter 1, results in an effective balancing of structural integrity and emotional fulfillment. Every movement of Op. 58 possesses qualities of movements in a traditional sonata cycle; however, the tendency to blend structural elements, the expansion of thematic material, and the postponement of climaxes contribute to Chopin’s distinctive treatment of the sonata genre.