Sol LeWitt
American, born 1928
Four-Sided Pyramid, first installation 1997, fabricated 1999
concrete blocks and mortar, 458.15 x 1012.19 x 970.92 cm (180 3/8 x 398 1/2 x 382 1/4 in.)
National Gallery of Art, Gift of the Donald Fisher Family

Photographs © Dennis Brack/Black Star

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