This book contributes to the study of the notions of symbol and icon by examining two phenomena that greatly contributed to their development: the thought of Dionysius the Areopagite and the iconoclastic controversy. Different historical and philosophical-theological contexts are examined within the framework of the influence that Dionysius exerted on main protagonists in the controversy and the theology of icon. The reader will find a discussion of the main points of Dionysius’ doctrine, the features of the iconoclastic controversy, and an elaboration of the Areopagite’s aesthetic and symbolic theory with special reference to the theology of icon. Throughout the work Ivanovic seeks to offer broad insight relevant to many different disciplines, such as theology, philosophy, history, and art. Dionysian theory of symbols and apophatic theology, his concepts of light, icon, and visible things as “images of the invisible things” were the basis of the further development of the Orthodox theology of the icon, which constitutes one of the fundamental values of Christian theology. The analysis offered in this book incites further study of the doctrinal dimension of Christian iconology, as well as of Christian and Neoplatonic mysticism, Byzantine aesthetics, and of theological and cultural studies.