The article examines the stages of creative career of the composer, the brightest representative of the era of symbolism — A.N. Scriabin. His philosophy, concentrated around the main world-transforming idea of the composer — creation of the Mysterium, is known for its total cosmic scope. Many researchers of the symbolist’s works note this; however, the process of realization of Scriabin’s global ideas in the music of Art Nouveau through the prism of his own philosophy remains to this day in the background. It is customary to speak about the scope of ideas for his outstanding symphonic compositions, the innovative qualities of the music, the global philosophical ideas of the composer, originating from the reformist works of R. Wagner and the Dionysian philo-sophy of F. Nietzsche. His biography, the history of creation of his works and many other things are exhaustively studied as well. However, this article is largely dedicated to a specific matter — evolution of the composer’s musical style, at each stage of which a miniaturized incarnation of the late Romanticism in Scriabin’s refined style can be tracked. In other words, the problem of incarnation of the late Romanticism philosophy and the mysterium aspirations of Symbolism in the refined decorative music of Art Nouveau are of considerable interest. Thus, the innovative principle of the proposed article is in the originality of A.N. Scriabin’s works reviewing method: the composer creates a unique style, in which global cosmological ideas are wonderfully reflected directly in the elegant “box of Art Nouveau”.