Pantheon

The draw

It is the one Roman building you walk into rather than around, and it is still the record-holder. Almost two thousand years on, the reference work records the dome as the world's largest unreinforced concrete dome — no steel, no ribs, cast from Roman concrete. The reason it survives is not luck: it is one of the best-preserved of all Ancient Roman buildings, in large part because it has been in continuous use throughout its history, and the use was continuous because Phocas gave it to a pope in 609 and it became a church instead of a quarry.

And the geometry is a single decision. The height of the building equals the diameter of the dome, a little more than 43 metres. Turismo Roma reads that as the classical canons of Roman rational architecture; standing in it, it is the reason the room feels finished.

The friction

It is ticketed now, and the page you are reading is not the only one that still says otherwise. Turismo Roma publishes the hours and points at the Ministry's online purchase, but no reachable authority publishes the price, so plan on paying and check at the door. It is also one of the most-visited rooms in Rome, in a small square, with a queue that forms outside.

The tactic

Go to Mass if you want it for nothing, and understand what that means. The Chapter is explicit: access to liturgical functions and religious activities always remains free and without charge, and during them no tourist visit of any kind is permitted. Mass is 17.00 on Saturdays and the eve of feasts, 10.30 on Sundays and feast days. That is not a loophole — it is the building doing the thing it has done since 13 May 609, without interruption.

Then look up and count. The 28 coffers per ring are, Turismo Roma notes, a number considered perfect because it is 1+2+3+4+5+6+7. And at the summer solstice the beam through the oculus projects a disc of light on the floor of exactly the oculus's own diameter.

And look down. When it rains the water comes straight in and vanishes into 22 almost invisible holes in a floor that is in good part original.

Skip it if you:

• Expected to walk in free. That was true once and is not now.
• Want quiet. It is a single room taking the whole of the day's visitors.
• Are coming during a service. Tourist visits stop entirely while the liturgy is on.

This is a church that has never stopped being one. The Chapter records the basilica as consecrated to Catholic worship since 13 May 609 and used uninterruptedly from that day for prayer, the Sunday Eucharist and the sacraments. It is not a monument with services added; it is a parish that happens to be two thousand years old.

The rule about services is not a courtesy, it is the rule. During liturgical functions no tourist visit of any kind is permitted — the Chapter says so in the same sentence in which it says access is free. If you are inside at 10.30 on a Sunday, you are at Mass.

Two kinds of dead are here. The kings of Italy since 1870 and artists including Raffaello Sanzio. The tombs are visited by people for whom they are not sights.

The floor is largely original and is the drainage. It is laid in porphyry, giallo antico, granite and pavonazzetto with 22 holes cut through it. Wet stone around the oculus's footprint is slippery and is also an eighteen-centuries-old surface.

Buying the ticket supports a state monument; a donation supports the basilica. They are run by different bodies — the Ministry owns and ticket-sells the building, the Chapter keeps the liturgy going — which is worth knowing when deciding where to put money.

Hours

Turismo Roma publishes the Pantheon as open every day 09.00–19.00, with last entry at 18.30, and warns that the hours may vary because of religious celebrations. It is closed on 1 January and 25 December, save for extraordinary openings under a Ministry of Culture project.

Admission is ticketed — and no reachable authority publishes the price

Entry is not free. Turismo Roma lists hours, contacts and an online purchase link to the Ministry's portal, but publishes no admission price. The Pantheon is state property, managed by Italy's Ministry of Cultural Heritage; the Chapter of Canons that runs it as a basilica does not sell the ticket, and the Ministry's booking portal exposes no price in its pages.

So this page does not quote a figure. Plan on paying, buy through the Ministry's portal or at the door, and treat any price you read elsewhere — including older versions of this page, which said entry was free — as needing checking.

Ticket & Pass Decision Matrix

What is free here

The liturgy, always. The Chapter states that access to liturgical functions and religious activities always remains free and without charge — and, in the same breath, that during them no tourist visit of any kind is permitted. The two halves are inseparable: you may come in for nothing, and while you are in, you are at a service rather than looking round.

Mass times: 17.00 on Saturdays and days before feasts; 10.30 on Sundays and feast days.

What this means in practice

If you want the building as architecture, come in opening hours and buy a ticket. If you want it as the church it has been since 13 May 609, come to a Mass. Doing the first during the second is the one thing that is not allowed.

How long

Thirty minutes. It is one room, and the whole of it is visible from the door.

First thing, at 09.00. The Pantheon is a single room taking an entire day's visitors, and it has no second space to absorb them. The hour after opening is the only reliably uncrowded one.

Rain is the reason to change your plans, not to cancel them. When it rains the water falls straight through the oculus in a visible column and disappears into the 22 almost invisible holes in the floor. It is the one weather in which the building demonstrates itself.

The summer solstice is the set piece. The beam through the oculus then projects a luminous disc on the floor of exactly the oculus's own diameter.

Pentecost is the other one. Every year a rain of rose petals falls from above inside the Pantheon at the close of the celebration.

Check whether a service is on before you set out. Turismo Roma warns the hours may vary because of religious celebrations, and the Chapter's rule is absolute: during the liturgy no tourist visit of any kind is permitted. Mass is 17.00 Saturdays and 10.30 Sundays, so a Sunday late morning is the one slot to avoid if sightseeing is the point — and exactly the slot to choose if it is not.