Johann Sebastian Bach was a Lutheran and much of his music was for Lutheran liturgical worship. As these insightful essays in the twelfth volume of Bach Perspectives demonstrate, he was also influenced by–and in turn influenced–different expressions of religious belief. The vocal music, especially the Christmas Oratorio, owes much to medieval Catholic mysticism, and the evolution of the B minor Mass has strong Catholic connections. In Leipzig, Catholic and Lutheran congregations sang many of the same vernacular hymns. Internal squabbles were rarely missing within Lutheranism, for example Pietists’ dislike of concerted church music, especially if it employed specific dance forms. Also investigated here are broader issues such as the close affinity between Bach’s cantata libretti and the hymns of Charles Wesley; and Bach’s music in the context of the Jewish Enlightenment as shaped by Protestant Rationalism in Berlin. Contributors: Rebecca Cypess, Joyce L. Irwin, Robin A. Leaver, Mark Noll, Markus Rathey, Derek Stauff, and Janice B. Stockigt.