ENThe Feast of the Assumption of the Blessed Virgin Mary is one of the most popular Catholic feasts in Latvia and Lithuania. In Latvia, it is prominently celebrated in Aglona and in Lithuania ñ in Krekenava and Pivai˚nai. The decoration of celebrations is the religious hymns. These hymns and music have not been researched in the field of religious ethnology. For this research, the following objectives were set: firstly, to shortly introduce the historical origins of the Feast of the Assumption of the Blessed Virgin Mary; secondly, to reveal these hymns and music; and thirdly, to investigate the origins of literary and music texts of these hymns. The results of the research validate the hypothesis set at the beginning of the research: the music of the Feast of the Assumption of the Blessed Virgin Mary in Aglona from Lithuania (Krekenava and Pivai˚nai) reveals a wider spectrum of hymns and all these regions are united by the fact that these songs of literary and musical texts are of local origin. [From the publication]