Pantheon

When it rains in Rome, the rain falls through the Pantheon’s oculus and lands on the floor below. This is not a design flaw. The Romans built 22 drainage holes and a subtly curved floor with an underground channel system to handle it. The dome above you, 43 metres in diameter and made entirely of unreinforced concrete poured in 126 AD, is still the largest such structure ever built. Every concrete dome built since, including St. Peter’s Basilica, the Pantheon’s direct descendent, is smaller.

That is what most visitors do not quite grasp when they walk in. The Pantheon is not impressive because it is old. It is impressive because nothing we have built since, for nearly two thousand years, has matched the engineering.

Getting In

The entry situation changed significantly in 2022 when Rome introduced paid tickets, ending a long era of free admission. As of mid-2026, the standard ticket is €5 (rising to €7 from July 1, 2026). Tickets are timed and nominal: your name must match your ID, and you book in advance via the Musei italiani website or app. On the first Sunday of each month, entry is free but also unticketed, which means you queue at the door with everyone else in Rome who had the same idea.

EU citizens aged 18-25 pay €2. Under 18s enter free. Roman residents enter free. Licensed guides enter free.

Opening hours are 9 a.m. to 7 p.m. daily; last entry 6:30 p.m. The queue management with timed tickets is markedly better than the old system, but book at least a few days ahead in summer or you will find the slots gone.

The Engineering

The oculus at the apex of the dome is 9.2 metres across. It is the only source of natural light in the building. As the sun moves, the light beam traces a reverse sundial across the interior; not a shadow but a beam of light marking the hours. Scholars have identified that on specific dates in late April, the beam hits the entryway exactly as the doors open, which may have been designed to coincide with imperial ceremonies marking the start of the Roman campaign season.

The dome itself is a feat of material science as much as architecture. The Romans used progressively lighter concrete mixes as the dome rises, switching from heavy travertine aggregate near the base to pumice and volcanic lapilli near the oculus, cutting the structural load at the critical upper sections. The oculus ring at the top acts as a compression ring holding the dome in tension. The drum walls are 6.4 metres thick and contain hidden barrel vaults that carry the load into eight structural piers.

Most tourists look up. Spend some time looking at the floor: the original marble, geometric patterning of circles and squares, is almost entirely original Roman work. Almost nothing else in the building is from the 2nd century, but the floor is.

What Else to Look At

The Pantheon contains the tombs of Raphael (second niche on the left as you enter) and two Italian kings, Vittorio Emanuele II and Umberto I. Raphael requested burial here specifically, an unusual honour for a painter and a measure of his standing in 16th-century Rome.

The portico columns are monolithic granite shafts quarried in Egypt and transported by ship to Rome. Sixteen of them, each 13 metres tall. The engineering of moving those shafts from Aswan to Rome to their upright position is its own story that nobody has fully explained.

Where to Eat

The blocks immediately around the Pantheon are expensive and mostly tourist-oriented. This is fair warning.

Armando al Pantheon (Salita de’ Crescenzi 31) is the exception. It has been run by the same family since 1961, takes reservations, and serves honest Roman cooking: cacio e pepe, coda alla vaccinara (oxtail stew), supplì. It is the restaurant nearest to the Pantheon worth eating at. Lunch is busy; dinner is marginally easier to book.

For something cheaper, walk three minutes to the Campo de’ Fiori neighbourhood and the options immediately improve and the prices drop. Forno Campo de’ Fiori (Piazza Campo de’ Fiori 22) does excellent pizza al taglio (by the slice) and is the lunch choice for the people who actually live nearby.

Gelato: avoid anywhere with signs in multiple languages and mounded-up colourful gelato in open trays. Look for gelato kept in covered metal pots (a sign of the real thing). Giolitti (Via degli Uffici del Vicario 40, a few minutes from the Pantheon) has been operating since 1900 and is the reference standard.

Where to Stay

Hotel Senato (Piazza della Rotonda 73) is literally on the square facing the Pantheon. The rooms facing the front have the most obvious view in Rome; the price reflects it. Worth splashing out for one night if you want the experience of watching the evening light hit the portico from your window.

Palazzo Dama (Lungotevere della Farnesina 30) is a boutique hotel in a historic palazzo near the Castel Sant’Angelo, 15 minutes’ walk from the Pantheon. More interesting than the big chains, with a rooftop pool and rooms that feel like they belong somewhere in the building’s actual history.

For a budget-conscious option, the Trastevere neighbourhood (about 25 minutes’ walk, or a short tram ride) offers far better value and a more interesting street environment than the immediate tourist core around the Pantheon.

Getting There

The Pantheon is not directly served by Metro. The nearest stops are Spagna (Line A) or Colosseo (Line B), both about 20 minutes’ walk. Bus lines 40, 62, and 87 stop closer. Most of the historic centre is more sensibly explored on foot.

Walking from the Trevi Fountain to the Pantheon takes about 10 minutes and the route is through good streets. Walking from Piazza Navona takes four minutes.

A Timing Note

The late-afternoon light, entering at an angle through the oculus rather than straight down, is more dramatic than the harsh overhead midday sun. If you can book a 4:30 or 5 p.m. slot, the quality of the light inside is noticeably different and the crowds have thinned compared to the morning peak. The €5 entry is worth an extra hour of planning to get this right.