National Air And Space Museum Modern Facade Abstract Sculpture Washington DC USA // WASHINGTON DC, United States — A twisting abstract sculpture stands outside the modern stone facade and glass entrance of the Smithsonian National Air and Space Museum. Designed by architect Gyo Obata and opened in 1976, the modernist building features interlocking geometric volumes traditionally clad in Tennessee pink marble to harmonize with the surrounding architecture of the National Mall. The prominent bronze artwork, titled "Continuum" by sculptor Charles O. Perry, was installed the same year to mathemati

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