Castel Sant'Angelo

|map dot label=Mausoleum of Hadrian |map_label_position=left |map_type=Italy Rome Antiquity |map_overlay=Roma Plan.jpg |map_caption=Shown within Augustan Rome |map_size=270 |image_size=270 |mapframe-frame-width=270 |mapframe=yes |mapframe-caption=Click on the map for a fullscreen view |mapframe-zoom=13 |mapframe-marker=monument |mapframe-wikidata=yes |location= |built=123–139 AD |builder=Hadrian |type=Mausoleum }} The Mausoleum of Hadrian (), more often known as '''Castel Sant'Angelo''' (; ), is a towering rotunda (cylindrical building) in Parco Adriano, Rome, Italy. It was initially commissioned by the Roman Emperor Hadrian as a mausoleum for himself and his family. The popes later used the building as a fortress and castle, and it is now a museum. The structure was once the tallest building in Rome. Provided by Wikipedia