A Papal fortress towering on the banks of the Tiber River, which was built on the mausoleum of the Roman Emperor Hadrian. It is connected to the Vatican by a secret corridor the so-called Passetto which served as an escape route for the popes. The original construction of the mausoleum was completed in 139 AD and the building was known as Hadrianeum. During the following years, the building was several times demolished, repaired and rebuilt. The visitors can admire the scenic view from the Angel’s Bridge also built by Hadrian. Today the building houses a museum that reveals the history of the castle, you can also visit the papal chambers or enjoy the magnificent views of the Vatican and Rome from various high points of Castel Sant’Angelo.