Serhiy Lepyavko (Mihaychuk Fellow, Fall 2010) is Professor of History at the Gogol State University of Nizhyn. He received his Kandydat nauk in history in 1992 and his Doctor of Sciences in history in 2000, both from the Institute of History of Ukraine, National Academy of Sciences of Ukraine, Kyiv. The objective of Lepyavko’s research topic, “The Christian-Muslim Frontier in Ukraine, Fifteenth–Eighteenth Centuries: A Study in Political and Military History,” is to present a history of the important military conflicts between Muslims and Christians on the territory of present-day Ukraine. Lepyavko has written extensively about Ukrainian Cossacks, and his forthcoming work is titled History of Chernihiv (Kyiv, 2010).