Eugen Mittwoch's seminal work delves into the fascinating history of prayer and religious rites, focusing particularly on their evolution within Islam. This insightful comparative study meticulously examines the parallels and divergences between Islamic prayer, Jewish prayer traditions, and Christian Sunday worship. The analysis extends to a detailed comparison of the significance and structure of Islamic Friday prayer versus Christian Sunday services, offering a unique scholarly perspective on the shared and distinct ritual practices across these Abrahamic faiths. Mittwoch's research sheds light on the historical development of these central religious acts, providing a rich understanding for theologians, historians, and anyone interested in comparative religion.