The purpose of the article is the insert to the scientific research the complete analysis of masterpiece by known Ukrainian composer Dmytro Stetsiuk Te Deum for mixed choir a capella and draw the attention of the choir conductors, who would like to insert to their music collectives a masterpiece, written in the tendencies of modern music and that can be performed either in the liturgy or in concerts. The methodology of the exploration is based on the combination of the general scientific (historical and comparative) and special musicological( of the genre, general and the dramaturgical-intonational analysis), that gives the opportunity to regard the historical basics of the Catholic liturgic tradition, and from another side-see the ways of its development and renovation. Scientific Novelty. The research is the first analysis of Te Deum for the mixed choir in the context of the modern tendencies of Ukrainian composers. Conclusions. The analysis of Te Deum for the mixed choir a capeella by Dmytro Stetsiuk in the context of religious music and in the sphere of the creative search of the modern Ukrainian composers proves the fact, that this masterpiece is written in the liturgic tradition and develops it in the intonational side. Componist completely uses the canonic text, but gives his own regard for it, also understanding of the main idea. The traditional melody of Te Deum from one side gives the unity of the composition, from another gives the basics for the modern stylization, because of intonation, voice tembre (the unity of the different groups of the choir), harmonical, factual (harmony and polyphony). This way are revealed individual traits of the composer and also the modern regard on the medieval liturgic text. The exploration of the masterpiece`s score gives the reason to be sure, that it is not only in the liturgical tradition, but also can be performed in the concert hall.