In the interwar time one of the centers of the Belarusian national and cultural activities was Latvia. The main part of the Latvian Belarusians lived in Latgallia, where they were the indigenous population. Due to the very liberal legislation of the Republic of Latvia until 1934, local Belarusians enjoyed national-cultural autonomy, which, however, has been eliminated, along with the establishment of the country’s authoritarian regime of Karlis Ulmanis. During the German occupation (1941-1945), national-cultural life of Latvian Belarusians increased significantly. A pragmatic policy of occupiers contributed to this. One of the essential aspects of the Belarusian life at this time was a musical and theatrical activity. This article examines in detail the conditions under which the activity of Belarusian musicians and actors occurred as well as it analyzes the results of their work.