Vasily Osipovich Klyuchevsky - an outstanding Russian historian, academician, professor at Moscow University and the Moscow Theological Academy, founder of a scientific school - wrote about the events and facts of Russian reality in a fascinating and accessible way. Historical portraits, diaries and aphorisms of the scientist - a brilliant master of words - reflect his thoughts about science, life, human virtues and shortcomings. “In the life of a scientist and writer, the main biographical facts are books, the most important events are thoughts” - this is a statement by V.O. Klyuchevsky confirms his whole life.