The subject of this book is the norms of behavior of people in church society, having centuries-old traditions and arising from the very structure of the Church. It considers such issues as the hierarchical structure of the Church, its administrative-territorial structure, external insignia of the clergy, the rules of conduct of Christians in an Orthodox church, the rules of correspondence and circulation (including at church receptions), some differences in traditions between the Russian Orthodox Church and other Churches. The diptych of the Primates of the Local Orthodox Churches and a brief dictionary of the main church terms are given.