This book attempts to examine the phenomenon of Christian globality, with all its parametres and in all the ways in which it was manifested. It is the novelty that defined the long course of the Eastern Roman Empire with the adoption and incorporation into the Roman political-ideological system of the new, already widespread by the 4th century, religious and social movement, Christianity. This new ideological tendency deeply influenced the Roman system and became the core of the new ideology concerning “globality” or “political universality”. The establishment of Christianity as the dominant religion after the Capital’s move from West to East, its rapid spread both inside and outside the Empire, as well as the establishment of the Christian Church as an official state institution, gave new impetus to the Roman ideology, drastically altering its content. This ideological platform became the starting point for the Byzantine globality of Orthodoxy and the basis on which the whole imperial political construct was founded. Christian ideology was used as a moral complement to the Byzantine political practice with the goal of global dominance for the Empire.