This article is dedicated to O. V. Sukhobokov, Ukrainian archaeologist, researcher of Slavic and Rus’ history, Doctor of Historical Sciences. His scientific interests were focused on the Early Slavic and Old Rus’ archaeology of the left bank of the Dnipro forest-steppe area, and the history of the Eastern Slavic tribe of Siverians.
 The research conducted by O. V. Sukhobokov at the head of the Left Bank Slavic-Rus’ Expedition of the Institute of Archaeology of the National Academy of Sciences of Ukraine became an important stage in the historical and archaeological study of the northeastern region of the Dnipro area, in particular the territory of the modern Sumy oblast. The expedition explored such significant sites as Kurgan-Azak, Bytytsia, Volyntseve, Monastyryshche, Kamiane, Nytsakha, Lukhtivka, Igorivka, and Zelenyi Gai. As a result, scientists confirmed the founding date of the cities from the Kievan Rus’ Chronicles such as Lubny, Putyvl, and Romny.
 After multiple years of research on the Left Bank the original concept of the historical process in the Dnipro—Don interfluve was developed by O. V. Sukhobokov. Scientists have brought together an immense amount of materials from field research and reconstructed the ethnic processes and development of the Slavic population of the left bank Dnipro at the second half of the 1st and the beginning of the 2nd millennium AD.
 The achievements of the Left Bank Slavic-Rus’ expedition became the basis for further research, scientific debates, and were discussed at conferences and seminars. They are presented in numerous articles, and five monographs. Three monographs are dedicated to the sites of the Sumy region: «Putyvl and its region in the Kievan Rus’ time (on the archeological materials)» (1990), «“Unknown Land”: the population of the Middle Psel basin in the 10th—13th centuries AD (on the materials of the Romny-Kievan Rus’ sites in the Kamennoe settlement)» (2012), «Ancient Putyvl» (2019) in co-authorship with S. P. Yurenko. V. Sukhobokov made a lot of efforts to preserve the historical and cultural heritage of Ukraine, popularize archaeological sites, and arrange archaeological sections of the Collection of Historical and Cultural Sites of Ukraine in the Sumy and Poltava oblast (as a scientific consultant).
 While working on the territory of Sumy oblast, the scientist established close cooperation with the Sumy Museum of Local Lore, as well as regional museums. The fund collections of the Putyvl, Romny, and Sumy museums have significantly grown and are represented in their exhibitions. For many years, O. V. Sukhobokov was a member of the editorial board of the journal Sumska Starovyna.
 The scientific and creative heritage of O. V. Sukhobokov is currently used by historians, archaeologists, as well as museologists, university professors, and school teachers in their professional studies.
Read full abstract