Soviet cosmic mosaics are the glass-and-ceramic smalti murals that clad Palaces of Culture, metro stations and the VDNKh Cosmos pavilion after Gagarin's 1961 flight. Deep cosmic-blue tesserae form the void of space behind a heroic cosmonaut, with hot red flags, gold stars and silver suits set in grey grout.

The aesthetic is socialist-realist: monumental in scale, built on hard diagonals, and earnest to the point of reverence. Every surface is faceted — light catches the chipped glass, grout lines draw the eye, and radiating orbits frame the figure like a secular halo.