The purpose of this study, ve to analyze the stylistic characteristics in the unaccompanied music of one twentieth century composer, Francis Poulenc, in order to discover the choral problems which would confront choruses and conductors as they performed his music. It is hoped that this study will not only enable choral conductors to better understand, interpret, and appreciate the music of Poulenc, but also will serve as a guide toward the investigation of other twentieth century composers and their works.