Completed shortly before Joseph Stalin's death in 1953, the vysotkii, or "sky houses," still dominate the Moscow skyline today. Seven in all, they were the Soviet answer to the American skyscraper, transforming the Soviet capital from a feudal backwater into the city of the future. With their soaring towers and gothic architectural details, the vysotkas were intended to be enduring monuments to the workers state and to the glories of Communism-though...