Postconstructivism was a transitional architectural style that existed in the Soviet Union in the 1930s, typical of early Stalinist architecture before World War II. The term postconstructivism was coined by Selim Khan-Magomedov, a historian of architecture, to describe the product of avant-garde artists' migration to Stalinist neoclassicism. Khan-Magomedov identified postconstructivism with 1932-1936, but the long construction time and vast size of the country extended the period to 1941.
Existence of this style is evident, but Khan-Magomedov's explanation of its evolution as a natural process inside the architectural community, rather than as a result of political direction by the Party and State, is strongly disputed.
Read more about Postconstructivism: Khan-Magomedov's Viewpoint