To turn left upon entering the darkened exhibition hall of “Retrotopia: Design for Socialist Spaces” is to encounter a motley, utterly heterogeneous collection of objects ranging from the decorative to the domestic to the medical. Nestled against one wall is Cosmic Fantasy (1965): an experimental public sculpture work by Lithuanian artist Algimantas Stoškus consisting of luminescent slabs of stained glass arranged, Tetris-like, on a series of suspended geometrical forms. Adjacent to this is a mint condition Saturnas vacuum cleaner—the ultimate kitschy fusion of lofty, celestial aspirations and household banality—complete with orbiting moon wheels and ring. In a vitrine just opposite the Saturnas is the least recognizable item of the group: a tubular, vaguely biomorphic form that appears to be woven out of some sort of textile. This, it turns out, is one of the first vascular prostheses ever made: a specific model of artificial aorta manufactured in 1960s Lithuania using re-engineered German ribbon-weaving machines. Selected by Lithuanian curator Karolina Jakaitė, this eclectic assemblage of objects and artworks (along with contributions from other Lithuanian creators like sculptor Teodoras Kazimieras Valaitis and architect Vytautas Edmundas Čekanauskas) is one of eleven unique “capsules” that comprise the collaboratively curated “Retrotopia.” In its simultaneous diversity …