El Castillo De Sant Angelo

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, and it is now a museum. The structure was once the tallest building in Rome.
  • Builder: Hadrian
  • Founded: 123–139 AD
  • Type: Mausoleum
Data from: en.wikipedia.org