This work is devoted to the popular veneration of the Holy Three Kings and to the religious and traditional significance of their feast day. The author examines the origins and historical development of the tradition of the Kings within Christian custom, demonstrating how belief, legend and popular devotion became closely intertwined over the centuries. The book is intended for readers with an interest in religious history, folklore studies and Christian traditions. The book explores the biblical and apocryphal foundations of the veneration of the Holy Three Kings and their expression within popular belief. It describes rituals, blessing formulas, processions, house blessings and regional customs associated with Epiphany. Particular attention is given to the symbolism of the Kings, the cult of their relics and the importance of Cologne as a major pilgrimage centre. The study combines historical sources with folkloristic analysis and documents regional variations within the German speaking world. Karl Meisen was a German folklorist and historian of religion, specialising in Christian customs and popular piety. His research focused on feast days, the veneration of saints and regional traditions, particularly in the Rhineland and the wider German speaking regions. His publications are regarded as authoritative contributions to the study of religious folklore.