Music in the California missions was a pluralistic combination of voices and instruments, of liturgy and spectacle, of styles and functions - and even of cultures - in a new blend that was non-existent before the Franciscan friars' arrival in 1769. This book explores aesthetic, stylistic, historical, cultural, theoretical, liturgical, and biographical aspects of this repertoire. It contains a "Catalogue of Mission Manuscripts," 150+ facsimiles, translations of primary documents, and performance-ready music reconstructions.