The program Musica sacra nova. In reservato unites large choral and orchestral compositions, where spiritual themes are revealed through the interaction of the choir, mezzo-soprano, and a large symphony orchestra. The music of the 20th century presents itself in all its emotional power, depth, and expressiveness. The program Musica sacra nova. In reservato addresses works that explore spiritual themes of the 20th century through the combination of choir, voice, and large symphony orchestra. The compositions of Churgeishvili, Denisov, and Lokshin create a wide palette of sounds, combining dramatic climaxes, subtle texture work, and attention to internal emotional tension. The music addresses deep experiences and reveals texts related to spiritual traditions and human experience. The State Academic Symphony Orchestra of Russia named after E.F. Svetlanov and the State Academic Russian Choir named after A.V. Sveshnikov interpret the material with attention to the balance between large masses of sound and chamber episodes. Under the direction of Alexey Rubin, the ensembles build the structure of the works to emphasize the dramaturgy and showcase the contrasts embedded by the authors. The mezzo-soprano part of Polina Sharovarova adds lines of expressiveness, conveying intonations based on the subtlest dynamic transitions and deep vocal registers. Denisov's Kyrie, based on the theme of an unfinished fragment by Mozart, demonstrates the intersection of tradition and innovation. The combination of choir and orchestra forms a sound space where each line has its own meaningful significance. Churgeishvili's symphony stands out for its grand form and the tension of harmonic development. Lokshin's cantata on texts from Anna Akhmatova's "Requiem" and the Russian Orthodox service enhances the emotional effect of the program, addressing themes of memory, resilience, and spiritual search.