Abstract: This article is dedicated to the research of the peculiarities of the interpretation of the choral genres in the work of Arthur Lourié. As a result of the conducted musicological analysis, the authors determine the role of the composer’s work in the musical culture of the early XX century, and define the innovative attempts of aligning the expressional capabilities of the symphonic and choral scores, aimed at strengthening the coloristic and expressional capabilities of the choral sound. It is substantiated that the symphonization represents the dominant principle of development of the musical dramaturgy of the symphonic cantata for mixed chorus a cappella “In the Temple of Golden Dreams” of peculiarities of the interpretation of the choral genres in the work of Arthur Lourié. The authors prove that in the cantata the lyrical-dramaturgical principle of symphonism is realized at the level of musical dramaturgy and system of expressional means. They substantiate that peculiarities of the interpretation of the choral genres in the work of Arthur Lourié uses the methods of monothematic development and creates a system of thematic arches, which contribute to the structurization of the musical material and establish the opening intonation-impulse; he also implements innovative methods that help align the expressional capabilities of the choral and orchestral scores.