Castel Sant'Angelo

Originally commissioned by the Roman Emperor Hadrian as a mausoleum for himself and his family, construction of this massive cylindrical building began in 135 AD and was completed in 139 AD. It served as the final resting place for emperors until the late 2nd century, housing the remains of figures like Marcus Aurelius and Septimius Severus. Its strategic location on the banks of the Tiber River soon made it a vital component of the city's defenses, leading to its transformation into a military fortress during the 5th century. The building's identity shifted dramatically in 590 AD when, according to legend, the Archangel Michael appeared atop the structure to herald the end of a devastating plague, giving the monument its modern name. By the Middle Ages, the papacy took control of the fortress, integrating it into the Vatican's defensive system. A secret fortified corridor known as the Passetto di Borgo was constructed to allow popes to escape from St. Peter's Basilica to the safety of the castle during times of siege. Throughout the Renaissance, the interior was lavishly decorated with frescoes, turning parts of the grim fortress into a luxurious papal residence. Today, the castle stands as a national museum, offering visitors a journey through Roman, medieval, and Renaissance history while providing one of the most iconic silhouettes in the Roman skyline.