Mirosław Bałka, 30 x 20 x 4,5, 30 x 20 x 4,5, 30 x 20 x 4,5, 200 x 60 x 170, 60 x 30 x 6,5, 1990, concrete in steel construction (3 parts), sponge, salted water, plate in steel construction (1 part), wood in steel construction (1 part), dimensions same as title in cm