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View of the Mausoleum of the Emperor Hadrian (now called Castel Sant’Angelo) from the Rear, from Vedute di Roma (Views of Rome)
From the collection of Art Institute of Chicago. Free to download, adapt and use — no permission needed.
Credit lineView of the Mausoleum of the Emperor Hadrian (now called Castel Sant’Angelo) from the Rear, from Vedute di Roma (Views of Rome). 1750/59. Giovanni Battista Piranesi, Italian, 1720-1778. The Art Institute of Chicago, The Charles Deering Collection. CC0.