1. Features of the legal system Jus gentium. Its importance for the historical development of international law in the European region. 2. To define the essence of the concept of historical transformation, as a factor of continuity of the international law 3. Compare the processes of transformation of the ancient International law into Medieval one in the regions: Roman Empire, Byzantium, Kingdom of Kushan, Persian Empire. 4. Transformation characteristics of elements and components of the International law . 5. Compare, establish common and specific features of the ancient and medieval types of international law