What's to see at Castel Sant'Angelo?

Aerial view of Castel Sant'Angelo and Ponte Sant'Angelo in Rome, Italy.

Mausoleum of Hadrian

At the heart of the structure lies the original Roman core—a massive circular chamber that once held the ashes of Emperor Hadrian and his successors. Though the urns are long gone, the sheer scale and architectural genius of the burial chamber remain awe-inspiring.

Narrow prison cell inside Castel Sant Angelo, Rome, showcasing ancient stone walls and barred window.

The prison cells

Dark, narrow, and unsettling, these stone rooms were once used to hold political enemies and heretics. Allegedly, figures like Giordano Bruno and Benvenuto Cellini were imprisoned here. Look out for graffiti and carvings left by former inmates.

Castel Sant'Angelo in Rome with tourists exploring the historic fortress.

The papal apartments

High above the old tomb lie elegant rooms used by popes in times of crisis. These chambers, especially the Sala Paolina, are richly decorated with Renaissance frescoes, papal emblems, and ornate furniture. Don’t miss the library, papal bedroom, and the throne room.

Military exhibits displayed inside Castel Sant'Angelo, Rome.

The military museum

Throughout the upper levels and hallways, you’ll find collections of armor, weapons, and cannons used in the castle’s defense. These exhibits highlight the building’s transformation into a military stronghold during the Middle Ages.

Angel Terrace

The Terrazza dell’Angelo

The crown jewel of your visit—the rooftop terrace offers 360° panoramic views of Rome, including a perfect view of St. Peter’s Basilica. It’s named after the towering bronze statue of Archangel Michael, said to have sheathed his sword here as a sign of the plague’s end in 590 AD.

Passetto di borgo

Passetto di Borgo

This secret elevated corridor connects the castle to the Vatican City. It was used by popes as an escape route during times of siege. While not always accessible, some guided tours include rare access to this historic passage.

Castel Sant’Angelo highlights

Castel Sant'Angelo Archangel Michael statue

Archangel Michael statue

At the top of Castel Sant’Angelo stands the statue of Archangel Michael, marking a legendary moment in Roman history. According to tradition, Pope Gregory the Great saw a vision of Michael sheathing his sword here in 590 AD, signaling the end of a plague. The current bronze statue, made by Peter Anton von Verschaffelt in 1753, commemorates that vision. Today, it’s a key highlight of the castle and offers sweeping views of Rome.

Castel San'tAngelo Rome Passage

Passetto di Borgo

The Passetto di Borgo is an 800-meter elevated corridor built in 1277 by Pope Nicholas III to connect Castel Sant'Angelo with the Vatican. It served as an escape route for Popes, notably used by Alexander VI in 1494 and Clement VII during the 1527 Sack of Rome. Visitors can view it from the castle, and it occasionally opens to the public in summer.

Castel Sant'Angelo Rome Ponte

Ponte Sant’Angelo

The Ponte Sant’Angelois a 135-meter bridge built by Emperor Hadrian to link Castel Sant’Angelo to the city. Once called the Aelian Bridge, it became a key route for pilgrims to St. Peter’s Basilica. Renamed in the 7th century after the Archangel Michael statue was added to the mausoleum, it was later adorned with 10 angel sculptures by Bernini during the Renaissance.

A fortress through the ages: The history of Castel Sant’Angelo

135 AD – Emperor Hadrian commissions the structure as his mausoleum, intended as a grand tomb for himself and his family.
271 AD – Incorporated into Aurelian’s Walls, the tomb becomes part of Rome’s city defenses.
590 AD – During a plague, Pope Gregory the Great sees a vision of Archangel Michael atop the mausoleum, sheathing his sword. The vision marks the plague’s end and gives the castle its name.
14th century – Linked to the Vatican by the Passetto di Borgo, it becomes a refuge for popes during sieges.
Renaissance era – Popes transform it into a luxurious fortress-palace with apartments, frescoes, and chapels.
19th century – Used as a military barracks and prison before eventually becoming a museum.

From imperial tomb to papal stronghold, Castel Sant’Angelo has stood as a symbol of power, protection, and transformation for nearly 2,000 years.

Learn more about its history

Who built Castel Sant’Angelo?

Castel Sant’Angelo was commissioned by Emperor Hadrian in 135 AD as a grand mausoleum for himself and his family. The architect is believed to be Demetriano, a Greek engineer. Inspired by Roman imperial style, the design featured a circular drum atop a square base—an architectural form that symbolized eternity and imperial power.

Architecture of Castel Sant’Angelo

Castel Sant’Angelo is a striking blend of Roman imperial design and medieval military architecture, evolving dramatically over nearly two millennia. Originally constructed in 135–139 AD by order of Emperor Hadrian, the structure began as a mausoleum—featuring a massive cylindrical drum atop a square base, once crowned with a bronze statue and encircled by a garden and golden quadriga.

As Rome’s needs changed, so did the castle. By the 5th century, it was incorporated into the Aurelian Walls, and over time transformed into a fortified bastion. During the 14th–16th centuries, successive popes added battlements, drawbridges, spiral ramps, and luxurious Renaissance-style papal apartments, blending form with function.

Topped today by the imposing bronze statue of Archangel Michael, Castel Sant’Angelo is a rare example of a building that reflects layers of Roman, medieval, and Renaissance architecture—all coexisting in a single monumental structure.

All your questions answered about Castel Sant’Angelo

What is the castle famous for?

The Castel Sant’Angelo Rome is famous for being the tomb of Emperor Hadrian. It is also known serving as a fortress, prison, and Papal residence throughout history. Today, the museum is known for its cultural and historical value.

Why is it called the "Castle of the Holy Angel"?

The name originates from a legend in 590 AD when Pope Gregory the Great saw a vision of the Archangel Michael sheathing his sword atop the mausoleum, signaling the end of a plague in Rome. To commemorate this event, a statue of the angel was placed on top, and the structure became known as Castel Sant'Angelo.

Is it part of the Vatican?

Not officially — it’s a separate monument. But it’s linked to the Vatican by the secret Passetto di Borgo passage, used by popes to escape danger.

Was the castle ever a prison?

Yes — and a feared one. High-profile prisoners, including artists and political rebels, were once locked inside its stone cells.

How much time should I allocate for a visit?

A typical visit lasts between 2 to 3 hours, allowing ample time to explore the various levels, exhibits, and enjoy panoramic views from the terrace.

When is the best time to visit to avoid crowds?

Early mornings on weekdays are ideal for a quieter experience. Spring (April to June) and autumn (September to October) offer pleasant weather and fewer tourists.

Are there restrooms and cafes on-site?

Yes, restrooms are available, and there's a café on the upper levels where visitors can enjoy refreshments with a view.

Can I take photos inside the castle?

Yes, photography is allowed. However, the use of flash or tripods may be restricted in certain areas.

Are there any hidden gems within the castle?

The Passetto di Borgo, a secret passage connecting the Vatican to the castle, is a fascinating feature. Additionally, the terrace offers stunning views of Rome.

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