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lower right in black pen and ink: FOUR BENT PIPE RUN / FOUR LENGTHS OF BENT PIPE / BUTT TO BUTT ARRAY / NOVEMBER 1969 / NEW YORK / CARL ANDRE / (artist's monogram); lower right verso in graphite: 516 as is


Dorothy and Herbert Vogel, New York; gift 2007 to NGA.

Exhibition History
Medieval to Modern: Recent Acquisitions of Drawings, Prints, and Illustrated Books, National Gallery of Art, Washington, 2008, no. 186.