The book “Kingdom and Priesthood” is the first book of the multi-volume project “Power and Law in the History of the Church” by the famous Russian jurist and Byzantinist Velichko A.M., which includes works on the history and philosophy of law, “symphony of powers”, rights personalities, as they are revealed in Christian doctrine, about the moral idea of the state, as well as the relationship between law, politics and morality. A special place in the collection is occupied by the topic of the legal ideal in Byzantium, hesychia (“Jesus Prayer”), canon law and its differences from state law. The book is intended for students of law, history faculties, religious educational institutions, as well as all those interested in the theory and history of the Church, law and state, the theology of law