The Pantheon: Still Standing, Now Charging

The dome of the Pantheon – 43.3 metres in diameter – was the largest in the world for 1,300 years and has not been convincingly exceeded in pure engineering terms since. It was built in 125 CE by the emperor Hadrian, though the inscription on the portico still reads M AGRIPPA L F COS TERTIUM FECIT – Agrippa’s original claim from 27 BCE, a diplomatic gesture by Hadrian that the engineering community has puzzled over ever since. The oculus, the 8.8-metre circular opening at the dome’s crown, is the building’s only source of natural light. It has no glass. When it rains, the water comes in, and a drain in the floor takes it away. The drain works.

In 2023 the Pantheon began charging 5 euros for entry (after centuries free), and from July 1, 2026 the fee increases to 7 euros. EU citizens aged 18-25 get a reduced rate; under-18s, Rome residents, and visitors on the first Sunday of each month enter free. Book timed entry at musei italiani online; weekends sell out 2-3 days ahead. The queue without pre-booking is manageable in winter and can run 30-40 minutes in summer. The building functions technically as a working Catholic church, which makes the entry fee a slight philosophical peculiarity – though charging pilgrims for access is a tradition with a long pedigree.

What to Actually Look At

Most visitors spend fifteen minutes staring at the dome and leave. Spend twice that.

The geometry of the dome is the obvious starting point. The interior sphere defined by the dome would exactly fit inside the building – the interior height equals the diameter. The coffering reduces the dome’s weight while maintaining structural integrity. Engineers still dispute exactly how Hadrian’s builders achieved the concrete mix that has held without steel reinforcement for nineteen centuries.

The tombs: Raphael is buried in a wall niche on the left as you enter. His tomb bears a papal inscription describing his painting as equivalent to nature itself. The kings Victor Emmanuel II and Umberto I of unified Italy are in larger niches. The juxtaposition of Renaissance genius and 19th-century monarchy in a 2nd-century Roman temple is quintessentially Rome.

The porch columns are 14 metres tall, single pieces of grey Egyptian granite quarried and shipped roughly 2,000 kilometres. The scale of the Roman logistics required to place these objects in the centre of the city is worth a moment’s genuine consideration.

At noon on 21 April (the traditional founding date of Rome), the oculus illuminates the entrance doorway exactly. It is an annual alignment that many visitors specifically time their trip for.

The Neighbourhood

The Pantheon sits in the rione of Pigna, immediately south of Piazza Navona. Piazza Navona follows the outline of a 1st-century Roman stadium; the buildings around the square were constructed directly over the stands. The three Baroque fountains (Bernini’s Fountain of the Four Rivers in the centre) are extraordinary. Eat somewhere else.

Campo de’ Fiori, ten minutes south, is a daily market in the morning (produce, fish, flowers) and a pleasant piazza in the evening. The statue at the centre is Giordano Bruno, burned at the stake here in 1600 for refusing to recant his astronomical theories. The bars around the perimeter fill from 7pm.

Where to Eat

The restaurants in the immediate Pantheon piazza are tourist-priced without exception. Walk three blocks.

Grappolo d’Oro Zampano on Piazza della Cancelleria does Roman trattoria cooking at honest prices – cacio e pepe, carbonara, and seasonal offal dishes (coda alla vaccinara on Thursdays, trippa on Fridays). About 25-30 euros per head.

Supplì Roma on Via di San Francesco a Ripa in Trastevere is the reference for supplì – Roman fried rice balls with tomato and mozzarella centre. 2 euros each; order three.

Pizzarium Bonci near the Vatican uses daily-changing toppings and serves by weight. About 4-7 euros per 100g. The most interesting pizza in Rome, full stop.

For gelato: Giolitti near the Pantheon has been operating since 1900. The Sicilian pistachio is the benchmark.

The Rest of Rome Worth Your Time

The Colosseum requires advance booking at coopculture.it (18 euros, includes the Roman Forum and Palatine Hill). The arena floor tour costs 8 euros extra and is worth it. Borghese Gallery requires a two-hour timed slot (maximum 360 people, 15 euros, book at villaborg hese.it well in advance) and contains Bernini’s Apollo and Daphne and Pluto and Proserpina – the two sculptures that established that marble could be made to look like flesh.

Practical Notes

The most common mistake in Rome is overbooking sightseeing and underbooking eating. A long lunch at a neighbourhood trattoria is the equal of any museum. Rome in July and August is very hot and crowded; November through March (except Christmas week) offers significantly better conditions. Bring timed tickets for everything, arrive at opening, and allow more time than you think you need.