This book offers a clear and concise historical overview of the major religious movements of the ancient Mediterranean world existing from the time of the second millennium BCE up until the fourth century CE, including both the Judeo-Christian and pagan religious traditions. Recognizing the significant role of religious institutions in human history and acknowledging the diversity of religious ideas and practices in the ancient Mediterranean world, "religion" is defined as a collection of myths, beliefs, rituals, ethical practices, social institutions and experiences related to the realm of the sacred cosmos. Without focusing too much attention on technicalities and complex vocabulary, the book provides an introductory road map for exploring the vast array of religious data permeating the ancient Mediterranean world.