Hadrian's Mausoleum
castle and museum in Rome, formerly the imperial mausoleum of the emperor Hadrian and subsequent Roman emperors
The Mausoleum of Hadrian, now known as Castel Sant'Angelo is a towering cylindrical building in Parco Adriano, Rome.
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It was commissioned by the Roman Emperor Hadrian as a mausoleum for himself and his family. The building was later used by the popes as a fortress and castle. It is now a museum. The structure was once the tallest building in Rome.
