In the thirteenth century the mass cycle became established as a sacred musical form. By the end of the twentieth century the politicised concert mass had overshadowed it. Surprisingly, despite becoming a significant contributor to the Western art music repertoire, the concert mass has never attracted serious scholarship. While individual concert masses have been the subject of some studies, the form itself has received only limited attention, and never been comprehensively defined. This anomaly is addressed here by investigating three main topic areas: the variety of attitudes to sacred music within the Roman Catholic Church, the changing social, political and religious nature of Western societies, and the text of the mass itself. Focusing...