Baroque and classicism were called a binary star. In the national architecture, the avant-garde and neoclassicism can be also called a binary star. The model of succession of styles in architecture does not reflect the real situation in the 1920-1950s. Neoclassicism and different movements of “contemporary architecture” run parallel to each other both in the West and in the USSR. In the 1920s, the avant-garde was brighter, while In the 1930-1950s in the USSR – neoclassicism. “The new world of socialism” was observed in the patterns of “contemporary architecture” by party ideologists headed by Lev Trotsky. In the 1930s, the political situation changed, and the patterns of the “new world” came down to earth and acquired historical roots. The interaction of the avant-garde and neoclassicism produced a unique style of the epoch. Unfortunately, the monuments of that epoch decay very quickly.