"Monographs on the History of Western and Southwestern Russia" by V.B. Antonovich is a collection of essays on the history of Western and Southwestern Russia. The events that took place in various historical periods in this territory were of great importance for the history of the Russian state as a whole. The book opens with an essay on the history of the Grand Duchy of Lithuania before the death of Olgerd. According to the author, the relations of ethnographic and everyday principles in this territory, attempts to bring them closer together, their interaction are the main interest of the history of the Grand Duchy of Lithuania at that time.