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Interior view of the Pantheon, from Views of Rome
From the collection of Art Institute of Chicago. Free to download, adapt and use — no permission needed.
Credit lineInterior view of the Pantheon, from Views of Rome. 1768, published 1800–07. Giovanni Battista Piranesi (Italian, 1720-1778), published by Francesco (Italian, 1758-1810) and Pietro Piranesi (Italian, born 1758/9). The Art Institute of Chicago, Clarence Buckingham Collection. CC0.