In the period 1924-1933, the Russian architect Lazar Khidekel drew a formidable series of cities defying gravity by floating over the territory and creating a unique artificial landscape in which the new Soviet citizen would find a revolutionary way to live. These urban visions were not oneiric utopias of impossible worlds; Khidekel was convinced that they would come true in a near future that the Russians themselves had begun to build with the triumph of the Revolution...