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Customs and habits, as well as the relationship between the Slavs and the non-Slavs; the book focuses on how the ancient Russian state came into being, some major events that occurred at home and abroad after the founding of the ancient Russian state, the efforts and policies implemented by individual Russian princes to establish a unified country; the ancient Russian state and neighboring countries, especially Byzantium The book also describes the political, economic and cultural ties between Russia and Poland; the interactions and conflicts with the steppe nomads; the book also describes the conversion of ancient Russia to Orthodox Christianity and the spread and development of Christianity in Russia, etc.; This is a precious material for studying the history of ancient Russia from the 9th to the early 12th century, the history of international relations in Eastern Europe, and the Russian Orthodox Church.