ENThe article analyzes the “Autobiography” by Bоgyslaw Radzivill that is one of the most outstanding literary monument of the XVII century history of the Polish-Lithuanian Commonwealth. The duke’s memoirs were studied as an authentic source on the history of Polish Crown and Grand Duchy of Lithuania and as the duke’s walk of life. The analysis made gives a fair opportunity to specify the role of B. Radzivill in the political history of the country. Keywords: autobiography, memoirs, the author’s origin, subjectivism, historical accurary, the author’s character, material take off, the esthetics of Baroque. [From the publication]