This book provides a new way of understanding the role of the cult of the martyrs for the Cappadocian Fathers and their families. The study shows that the cult of the martyrs was so popular among all social levels of Christians, including the Cappadocian Fathers, that it formed the rudimentary framework for Christian piety in the fourth century. When Christianity became the state religion in 325, the fundamental presupposition of martyrdom as Christian identity became ambiguous. Thus it was