The ancient pyramid built by Gaius Cestius

The Pyramid of Cestius stands on Via Raffaele Persichetti in Rome. Built between 12 and 18 BC, it was a tomb for Gaius Cestius, a Roman official. The pyramid, made of brick-faced concrete with white marble and travertine foundation, measures 100 Roman feet square at the base and stands 125 Roman feet high. Its interior has a simple barrel-vaulted rectangular cavity. Sealed when built, it was plundered at some point thereafter, probably during antiquity. Restored in 1663 under Pope Alexander VII, the pyramid's exterior is 'egyptianizing,' while the interior displays classic Roman fresco paintings. The origins of the pyramid were forgotten during the Middle Ages, but it is believed that Cestius may have been inspired by pyramids in Meroe Nubia.

Sources: Wikipedia, OpenStreetMap, Wikidata, Wikimedia Commons