This thesis is a critical study of three violoncello suites of Johann 8ebastian Bach from the performer's point of view. Its purpose is to determine the comparative differences and similarities of several well known editions including the Bach Gesellschaft edition and the Pablo Casals recording. It will explain a few of the many discrepancies and provide adequate reasons for given suggestions and preferences concerning dynamics, tempi, ornamentation, bowing styles, and other elements of performance. By stating a brief historical background of the evolution of the violoncello and the development of musical form and style, it is possible to conceive Bach's ideas and intentions as he wrote the collection of six suites.