The Hymns of Muscovy is a trip to the eponymous planet, which is an upside-down space twin of the city of Moscow. Gliding along its surface, we look down at the sky and see historic architectural styles fly by—the exuberant Socialist Classicism, aka the Stalinist Empire, the laconic and brutalist Soviet Modernism, and the hodgepodge of their contemporary knock-offs and revivals.