Lectures on the History of Western Russia is a work by Mikhail Iosifovich Koyalovich, first published in 1864. In this work, the author examines the history of Western Russia from the time of the prince. Vladimir before the Polish Uprising of 1863, including a brief history Poland and pagan Lithuania. The book consists of 16 lectures, in which various aspects of the history of the region are analyzed in detail. In 1884, a fourth, expanded and revised edition was published under the title "Readings on the History of Western Russia". In the preface to this edition, Koyalovich notes that a lot of time has passed since the first issue, new historical documents and studies have appeared, which allowed him to significantly update and expand the content of the book. Lectures on the history of Western Russia” are a significant contribution to the study of the history of Western Russian lands and reflect the author’s views on the processes that took place in this region. Particular attention is paid to the analysis of the reasons for the division of Russia into the western and eastern parts, as well as the issues of the union and the struggle for Orthodoxy in the conditions of the dominance of Catholicism. There are stamps of libraries