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Chicago's Art Institute
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Art Deco: Chicago's Art Institute. @designerwallace
Technically a helix, though perspective makes it appear as a spiral.
Mechanics' Institute Library Spiral Staircase - San Francisco
Spiral Staircase in Black and White
Spiral staircase at the Royal Institute for the Study and Conservation of Belgium’s Artistic Heritage.
spiral in black and white #staircases
Faculty of Law, University of Sydney, Sydney, NSW, Australia / FMJT