A comprehensive overview of the history and theology of the Eastern Orthodox Church. This book examines the long journey of Eastern Christianity over two millennia, from its inception to its interaction with the modern world. It includes an overview of the Church's struggle to survive in the Eastern region amidst the turmoil of early Christianity. It also highlights how church doctrine and structure were heavily influenced by the cultural and political environment of the Byzantine Empire. It also explains the roots of internal conflicts (such as iconoclasm) and the great East-West Schism (Schism of 1054) that separated Eastern Orthodoxy from the Roman Catholic Church. Furthermore, the author provides readers with in-depth insights into mystical theology, liturgy, and the role of monasticism (monastic life), which are pillars of Orthodox identity.