What mysteries and legends hide within the walls of the Castle of the Holy Angel? Right here, on the banks of the Tiber River, stands a monument that has witnessed centuries of Roman history. The Castle of the Holy Angel, originally known as Hadrian’s Mausoleum, has served as a tomb, a fortress, a papal residence, and even a prison.
Built by Emperor Hadrian between 135 and 139 AD, this imposing structure was intended to be his final resting place alongside his wife and adopted son. Can you imagine the grandeur of the original mausoleum, crowned with cypress trees and a golden quadriga depicting Hadrian as the sun god Helios? Inside, a spiraling ramp, which you’ll climb during your visit, led to the burial chamber.
Over the centuries, however, the Castle of the Holy Angel underwent a dramatic transformation. As Rome faced threats from invading forces, the mausoleum was incorporated into the city’s defenses. The decorative statues that once adorned its roof were torn down, some even hurled at the enemy during the Gothic siege of 537.
But it was during the devastating plague of 590 AD that the castle earned its current name. Legend has it that Pope Gregory I, while leading a procession to pray for relief, witnessed a vision of the Archangel Michael sheathing his sword atop the mausoleum. The plague soon subsided, and the grateful pope christened it Castel Sant’Angelo, the Castle of the Holy Angel.
In the turbulent centuries that followed, the castle became a stronghold for popes seeking refuge from danger. A secret passage, the Passetto di Borgo, was built to connect it to St. Peter’s Basilica. Pope Clement VII famously used this passage to escape capture during the brutal Sack of Rome in 1527.
But the castle’s history also holds a darker side. It served as a prison, its walls echoing with the suffering of those condemned within. The sculptor and goldsmith Benvenuto Cellini was imprisoned here, accused of theft, though he later escaped. The unfortunate philosopher Giordano Bruno, condemned for heresy, spent six years within these walls before his execution in 1600.
Today, the Castle of the Holy Angel stands as a captivating museum. As you explore its ramparts, chambers, and courtyards, envision the emperors, popes, soldiers, and prisoners who walked these very halls. Their stories, intertwined with legends of angels and plagues, are forever etched into the stone of this remarkable monument.