Polotsk St. Sophia Cathedral is an outstanding monument of monumental Belarusian architecture of the KhІ-18th centuries. The famous Belarusian historian, local historian A.P. Sapunov (1851-1924) devoted his work to the history of Polotsk and the history of the St. Sophia Church. The historical monumental building is a valuable architectural monument and one of the symbols of national culture.