| Carlo Ponti Piazza del Popolo presa dal Monte Pincio (Roma) 1870-1880 Stereoview Library of Congress, Prints and Photographs Division Reproduction Number: LC-DIG-stereo-1s09724 (digital file from original) LL/109896 Handwritten note on verso: Popolo Gate, Lucian Hall, Rome, across the Tiber will be seen the Vatican and St. Peters.
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