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Sol LeWitt's Four-Sided Pyramid is made of concrete blocks that are carefully stacked and held together with mortar. At first glance the heavy blocks seem to be perfect cubes, but they are not. The front and back faces of each block are square, and the sides, top, and bottom faces are rectangular. This helps the artist balance the blocks and create an interesting stepped-back effect.
To make a virtual sculpture that defies the laws of gravity, click Cubits.
Copyright © National Gallery of Art, Washington