A Chronicle of the Reform: Catholic Music in the 20th Century By Msgr. Richard J. Schuler

“This study on the history of church music in the United States during the 20th century is an attempt to recount the events that led up to the present state of the art in our times. It covers the span from the motu proprio Tra le solicitudini, of Saint Pius X, through the encyclical Musicae sacra disciplina of Pope Pius XII and the Constitution on the Sacred Liturgy of the Second Vatican Council and the documents that followed upon it. In knowing the course of development, musicians today may build on the accomplishments of the past and so fulfill the directives of the Church.”