Castel Sant'Angelo is a historic fortress and museum located in Rome, Italy. Situated on the west bank of the Tiber River, it stands near the Vatican City and serves as one of the city's most prominent landmarks.
Originally commissioned by Emperor Hadrian as a mausoleum for himself and his family, the structure was later repurposed into a fortress, a papal palace, and a prison. Today, it functions primarily as a museum that houses various archaeological artifacts and artworks from its long history of diverse uses.