Religious beliefs and practices, which permeated all aspects of life in antiquity, traveled well-worn routes throughout the Mediterranean: itinerant charismatic practitioners journeying from place to place peddled their skills as healers, purifiers, cursers, and initiators; and vessels decorated with illustrations of myths traveled with them. New gods encountered in foreign lands by merchants and conquerors were sometimes taken home to be adapted and adopted. A full understanding of this complex spiritual world unfolds in Religions of the Ancient World, the first basic reference work that collects and organizes available information to offer an expansive, comparative perspective.