In their reports at scientific conferences, Ukrainian and foreign researchers have repeatedly emphasized the fact that Ukrainian archives contain a wide range of sources that illuminate events related to the social, political, cultural and scientific development of Belarus in the 16th - 20th centuries, as well as little-known facts of its history, Ukrainian-Belarusian interstate relations at the beginning of the 20th century, as well as personal documents of representatives of Belarusian culture, science and literature, whose fate was somehow connected with Ukraine. In this article, the author describes documentary materials of the Belarusian culture personalities in Ukraine's archives.