abstract: This research paper examines Guillaume Lekeu's Sonata for Piano and Violin (1892) from the perspective of a collaborative pianist, providing historical background, an analysis of the work's musical structure, and performance practice insights. Each chapter offers the performer a deeper understanding of various aspects concerning the work, including an in-depth analysis of cyclical features used by Lekeu. Lekeu was strongly influenced by his teacher, César Franck, and in particular by Franck's use of cyclic techniques, which profoundly impacted Lekeu's Sonata for Piano and Violin. The cyclic treatment, which includes cyclic themes, cyclic motives, and non-cyclic themes is discussed, enabling performers to achieve a relevant structural approach to this work. A performance guide includes practical advice for the interpretation and performance of the work, along with piano pedaling suggestions. The integration of these aspects enables a pianist to gain a better understanding and appreciation of Lekeu's Sonata for Piano and Violin. / Dissertation/Thesis / Doctoral Dissertation Music 2018