Image: Livioandronico2013 · CC BY-SA 4.0

Historic building in Rome, Italy

Castel Sant'Angelo, also known as Mausoleum of Hadrian, is a towering rotunda 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 dedicated to Saint Michael the Archangel, and it is now a museum. The structure was once the tallest building in Rome.

41.9031, 12.4663 · Open in map · Wikipedia