In this study the choral-orchestral compositions produced by Hector Berlioz are examined in detail for characteristics of musical form, textual setting, and methods of scoring for chorus and orchestra. Reasons for the preponderance of the choral-orchestral medium in Berlioz' output are examined in two introductory chapters. The initial chapter concerns Berlioz' personal experiences as an observer, conductor, and critic of choral music, while the second is devoted to Parisian customs in regard to the choral-orchestral medium during the eighteenth and early nineteenth centuries. Included in the historical chapter is a discussion of the haute-contre (high tenor or countertenor) voice preferred in French choruses of that period plus a short review of French orchestral practices, operatic choruses, the French Chapel, Parisian concert societies, and the Paris Conservatory. Especially important is the segment on revolutionary musical fetes which fostered grandiose compositions for chorus and instruments of extremely simple structure. Berlioz' sense of form was governed by his Gallic heritage and for this reason many critics have accused him of formlessness, when in fact his compositions invaribly revolve around a succinct formal plan, admirably executed. Berlioz added to the conservative French tradition which favored the strophe and the Rondeau (an unvarying refrain following disparate couplets) a decidedly learned and classical approach to music structuring; unfortunately, this unique combination of academic compositional techniques and Gallic forms has been a source of perplexity for analysts in search of traditional Germanic forms. Surprisingly, Berlioz makes frequent use of such complex compositional devices as augmentation, fugato, canon, pedal point, and even cantus firmus.