Nikolai Alekseevich Osokin (1843-1895) - a famous Russian historian, professor at Kazan University. His work "History of the Middle Ages" (1888) is read with great interest and is distinguished by a lively, fascinating presentation. On the pages of the book, we are faced with a number of historiographers who have preserved for us the world of a distant era, not only combining antiquity and modern times, but giving rise to the Renaissance and modern civilization. The "Essay on Medieval Historiography," which the author placed at the end of the book, presents information about Western, Slavic, Byzantine and partially Arab historians and chroniclers.