The Kirchenmusikalisches Jahrbuch offers an ecumenical forum for scholarly studies in the broad field of liturgical, sacred and religious music from antiquity to the present. Volume 103/104 (2019/20) contains articles on "Music and Mysticism" from the Middle Ages to the 20th century, on cult history as music history using the example of the Offici cycles in honor of St. Ursula, on typical procedures of 18th century South German church composers and on organ music at the turn of the 14th and 15th centuries.