Christian chronological systems. History of dating in the patristic and Eastern Christian tradition III-XV

In the book for the first time in Patriotic Science, the history of the emergence and development of chosings in ancient and medieval Christian tradition was considered in detail in detail. Various eras that existed in the Roman Empire, in the Christian East and Russia, as well as in Western Europe are described. The various types of ancient Polelii are considered and analyzed. The book is accompanied by an extensive reference material, including electronic synchronistic tables to recalculate. Different ER, definitions of Easter dates and major holidays, reigns of kings and emperors, etc.
The publication is addressed to both specialists and all interested in the historical chronology and the history of Christianity