The present dissertation consists in an original composition for solo piano, titled Seven Nocturnes (2020). The score is preceded by a critical essay in which I discuss the overall aesthetic and formal qualities of the work, its musical, philosophical, theoretical, and historical background, as well as specific performance suggestions for future interpreters. Particular emphasis is given to the work's experimental use of musical time and original approach in relating expanded time with directional harmony.

William Mason (1829–1908) was a well-known American composer, pianist, and pedagogue. Researchers have mainly focused on Mason's career as a pedagogue in the United States and his pedagogical treatises, which are widely considered and used as the conceptual core of teaching materials on the nineteenth century. However, there has been only an annotated catalogue of Mason's music works, and no performance guide to his piano compositions. This dissertation is designed to be the first performance guide to his solo piano repertoire and act as an introduction to his music through an examination of selected works suitable for the intermediate student. This study provides instruction for students on how to practice these works through the analysis of the elements of practice – pedaling, phrasing, technique practice, touch, and musical expression – which were all considered as essential by Mason himself for a good performance. The five piano works selected are: Three Preludes, Op. 8, No. 1; Ballade et Barcarole, Op. 15; Valse Caprice, Op.17; Spring-Dawn, Mazurka–Caprice, Op. 20; and Spring Flower–Impromptu, Op. 21.

In 1895, Emil Georg Conrad Sauer (1862-1942), a world-renowned German pianist and former student of Franz Liszt wrote his first piano concerto, which was published five years later in 1900. Sauer performed it extensively to enthusiastic crowds in Europe and the United States while on tour during the next several years. Then it vanished from the concert repertoire. It is no longer performed and has only been commercially recorded once. The purpose of this dissertation is to establish why it might have disappeared, and why there is value in bringing it back to the standard piano repertoire.

While he was composing his important orchestral tone poem Finlandia in 1899–1900, Jean Sibelius (1865–1957) made his own piano arrangement of it. The purpose of this study is to compare the piano arrangement and orchestral version and to see further the similarities with Sibelius's other piano compositions from the same time period (1899-1904). Through this study I have found compositional patterns, which are typical for the composer and defined his composition style for piano during his "Kalevala-Romantic" phase. Sibelius's piano style was characterized as unpianistic and bulky by some. However, through my research I can show that with an analysis of certain harmonic structures, subtle use of pedal and correct voicings, his piano texture is indeed very thoughtful and transparent with a clear focus on counterpoint while remaining pianistic and comfortable to play. In order to fully understand the idiosyncrasies of the two versions of Finlandia, a detailed comparative analysis of the piano and orchestral scores is necessary. For this purpose, I primarily used the printed scores of both the piano and orchestral versions. In addition, the manuscript of the piano version of Finlandia was consulted as an important resource. From the orchestra manuscript, only one page has been found. …