
castle and museum in Rome, formerly the imperial mausoleum of the emperor Hadrian and subsequent Roman emperors
Castel Sant'Angelo (pronounced [kaˈstɛl sanˈtandʒelo] Italian for 'Castle of the Holy Angel'), also known as Mausoleum of Hadrian (Italian: Mausoleo di Adriano), 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.

Castel Sant'Angelo is located in Roma Capitale, Italy. Its specific geographic coordinates are latitude 41.9030 and longitude 12.4663.
The museum was established in 139, making it a significant historical institution in the region.
Yes, it is quite popular, attracting approximately 918,591 visitors annually.
castle and museum in Rome, formerly the imperial mausoleum of the emperor Hadrian and subsequent Roman emperors... It is a key destination for those interested in culture and history in Italy.
