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An artist from this country created an installation featuring a slingshot hanging from a destroyed roof, The Man Who Flew Into Space From His Apartment. Dan Flavin's best-known light-tube piece is named for an artist from here who made assemblages called "corner counter-reliefs." An artist from this country claimed "space and time are the only forms" in a "Realist Manifesto" written with his brother Antoine Pevsner. An artist from this country planned to build a glass cube, pyramid, and cylinder that would (*) rotate once every year, month, and day respectively. An artist from here planned a 1,300-foot structure known as his "tower." This country's Constructivist art movement was championed by Naum Gabo and El Lissitzky. For 10 points, name this country that officially advocated socialist realism, the home of Vladimir Tatlin and Ilya Kabakov.
An artist from this country created an installation featuring a slingshot hanging from a destroyed roof, The Man Who Flew Into Space From His Apartment.
Soviet Union [or USSR; prompt on Russia]