What Is There to See Inside the Pantheon?
Inside, the highlights are the vast coffered dome, the open oculus, the ancient marble floor, and the tombs of Raphael and the Italian kings — all within one perfectly proportioned rotunda. It’s a short visit but an unforgettable one. Here’s what to look for and why it’s so remarkable.
The dome and its coffers
The Pantheon’s dome is its masterpiece — still the world’s largest unreinforced concrete dome, nearly 1,900 years after it was built. Look up at the five rings of sunken coffers, which lighten the structure and draw the eye toward the centre. The interior height and the dome’s diameter are famously equal.
The oculus
At the dome’s centre is the oculus, an 8.8-metre opening to the sky — the building’s only natural light source. The shaft of sunlight it casts moves across the interior through the day, and it’s open to the elements, so you may see (or feel) the weather come through. It’s the Pantheon’s defining feature.
The marble floor
Beneath your feet is the original Roman marble floor, gently convex and patterned in coloured stone. Small drainage holes carry away rain that falls through the oculus into an ancient hydraulic system that still works — a reminder of how thoroughly the Romans engineered the space.
The tombs
Around the rotunda are notable tombs: the Renaissance painter Raphael, and Italy’s first kings, Victor Emmanuel II and Umberto I, along with Queen Margherita. Their chapels turn the Pantheon into a national memorial as well as an ancient temple and a working church.
A working church
The Pantheon is officially the Basilica of Santa Maria ad Martyres, consecrated in the 7th century — the very reason it survived so intact. You’ll see Christian altars and chapels alongside the ancient architecture, and Mass is still celebrated here, so it’s a place of worship as well as a monument.
What to look for
- The coffered dome and its perfect proportions.
- The oculus and its moving shaft of light.
- The marble floor and its drainage holes.
- Raphael’s tomb and the royal tombs.
- The altars and chapels of the working basilica.
The portico and inscription
Before you go in, pause under the mighty portico with its monolithic granite columns, and read the Latin inscription — “M·AGRIPPA·L·F·COS·TERTIVM·FECIT” — crediting Marcus Agrippa, though the building you see was rebuilt under Hadrian. It’s one of the most photographed facades in Rome.
Make the most of a short visit
Because it’s a single space, you can take in the highlights in half an hour — but linger to watch the light shift through the oculus. An audio guide adds context on the engineering, the tombs and the building’s long history if you want more than the visual impact.
Take a moment to just look up
The single best thing you can do inside is pause beneath the centre of the dome and simply look up at the oculus and the coffers. It is easy to be busy taking photos and miss the sheer scale and calm of the space. Give yourself a few unhurried minutes there — ideally away from the busiest part of your slot — and the Pantheon rewards you with one of the most quietly awe-inspiring moments in Rome.
Book your Pantheon entry to see it all
To take in the dome, oculus, floor and tombs without a long wait, book your Pantheon time slot online in advance and consider adding an audio guide for the details. Secure your slot and step inside one of the ancient world’s greatest interiors.
Frequently asked questions
What is there to see inside the Pantheon?
The coffered dome, the oculus, the ancient marble floor and the tombs of Raphael and the Italian kings.
Why is the dome famous?
It’s still the world’s largest unreinforced concrete dome.
What is the oculus?
An 8.8-metre opening at the dome’s centre, the only natural light source.
Whose tombs are inside?
Raphael and the Italian kings, among others.
Is it a church?
Yes — the Basilica of Santa Maria ad Martyres, still in use.
Is an audio guide worth it?
It adds useful context on the engineering, tombs and history.