Russian studies of Byzantium in Europe and works of academician G.A. Ostrogorsky

The article describes the activities of G.A. Ostrogorsky (1902–1976) in the context of the development of the Byzantine studies in Europe in the 20 century, particularly in connection with the Seminarium Kondakovianum, later transformed as the Kondakov Archaeological Institute. The article contains the detailed bibliography of the scientist.