Pantheon vs St. Peter's Basilica

Quick verdict

• Tight on time: the Pantheon, comfortably
• Architecture: the Pantheon — the most influential surviving Roman dome
• Pilgrimage: St Peter's, without question
• Sculpture and Baroque art: St Peter's
• With children: the Pantheon — shorter, and the oculus does the work for you
• Free option: ordinary entry to St Peter's Basilica costs nothing

Book Pantheon Tickets, Tours & Hotels

Avoid buying your ticket on site by booking ahead — compare the official Musei Italiani ticket and the three best-known third-party providers, plus hotels next to Piazza della Rotonda.

Musei Italiani is the official Pantheon ticket seller. Third-party products may be tours, hosted-entry products or bundled services — check the exact inclusions before booking.

Scale and dome

• Pantheon dome: about 43.3 m interior diameter and the same again in interior height, in unreinforced concrete
• St Peter's dome: designed by Michelangelo and completed after his death; masonry, set on a tall drum, and rising far higher above the ground than the Pantheon's
• Interior diameters: published measurements of St Peter's dome vary slightly between surveys and sit marginally below the Pantheon's — the two are close enough that the "record" depends on which survey you cite
• Floor area: St Peter's is one of the largest church interiors in the world; the Pantheon's rotunda is a single room you can cross in under a minute

We deliberately do not publish interior-volume or crowd-capacity figures for either building: the numbers circulating online conflate the basilica with St Peter's Square and with one-off ceremonial crowd estimates, and we have not found authoritative published values for them.

Dimensions in detail: how tall is the Pantheon.

Age and history

The Pantheon as it stands dates to the Trajanic–Hadrianic period, conventionally around 125 AD, and was consecrated as a Christian church in 609 AD — which is a large part of why it survived when other temples did not.

St Peter's was rebuilt between 1506 and 1626 on the site of the fourth-century Constantinian basilica, which was demolished to make way for it. Bramante, Michelangelo, Maderno and Bernini all shaped the result. The Pantheon influenced Renaissance dome design in general; it is rhetoric rather than history to call it the prototype for every dome that followed, since Byzantine and Islamic dome traditions developed on their own lines.

Cost and tickets

• Pantheon: €7; free on the first sunday of the month
• St Peter's Basilica: ordinary entry is free, via the security check on the square
• St Peter's official portal: also sells paid reserved experiences and dome access — prices are set on the official booking site and have changed, so take the current figure from there rather than from a travel article
• Vatican Museums and Sistine Chapel: €20 at the ticket office, without an online reservation; €25 booked officially online (€20 admission + €5 reservation). Separate ticket, separate entrance

Time needed

• Pantheon: 30–60 minutes inside
• St Peter's Basilica: around 60–90 minutes for the interior at a normal pace, longer if it is crowded or you stop at each chapel
• Adding the dome and the grottoes: budget two to three hours in total
• The security queue: unpredictable — anywhere from a few minutes to well over an hour depending on the day, season and events

Crowds and queues

The Pantheon uses timed slots, which caps how many people are inside at once — but the rotunda is small, so even a capped crowd feels close. Calling it "quiet" would be misleading: it is calmest at the first slot of the day and towards closing.

St Peter's ordinary entry is free and unbooked, so the constraint is the security screening on the square. Mid-morning is the worst; early opening and the later afternoon are usually easier. Papal audiences and liturgical celebrations close or restrict the basilica at short notice, so check the Vatican's calendar for your date.

Art highlights

• Pantheon: the dome and oculus themselves, Raphael's tomb, the tomb of Annibale Carracci, the Egyptian granite portico columns and the royal tombs
• St Peter's: Michelangelo's Pietà, Bernini's baldacchino and Chair of St Peter, Michelangelo's dome, the papal altar, and numerous papal tombs in the basilica and the Vatican Grottoes

Doing both in one day

The walk between them is 25–35 min, and it is a good one — across the Tiber past Castel Sant'Angelo.

1. 09:00 — Pantheon on a pre-booked slot
2. 10:00 — coffee near Piazza della Rotonda
3. 10:30 — walk to the Tiber via Piazza Navona
4. 11:30 — Castel Sant'Angelo or the river walk along Via della Conciliazione
5. 13:00 — lunch in Borgo or Prati
6. 14:30 — St Peter's Basilica, when the security queue is usually shorter
7. Late afternoon — the dome climb, if it is still admitting; closing time varies by season, so check it on the day rather than planning a fixed sunset

Related: Pantheon vs Vatican Museums and Pantheon vs Colosseum.

Sources and further reading

• Ministry of Culture — official Pantheon tariff notice (€7 full price effective 1 July 2026) and free-entry categories
• Basilica Papale di San Pietro in Vaticano — official site
• Official St Peter's Basilica reservation portal (free basilica access, paid experiences and dome)
• Vatican Museums — official tickets and prices
• Encyclopaedia Britannica — Pantheon, Rome: structure, dating and history

Facts on this page last checked: August 2026. Prices, opening hours and transport routes in Rome change — always confirm with the official source before your visit.

Continue reading about the Pantheon

Frequently Asked Questions

Should I visit the Pantheon or St Peter's?

Both, if you can. The Pantheon is a compact, roughly one-hour highlight; St Peter's is a two-to-three-hour visit and longer with the dome. Forced to choose: the Pantheon for ancient Rome, St Peter's for Renaissance and Baroque art and for pilgrimage.

Which dome is wider?

The Pantheon's interior diameter is the larger of the two by a small margin, and it is unreinforced concrete rather than masonry. St Peter's stands much higher overall because its dome sits on a tall drum.

Is St Peter's free?

Entering the basilica itself is free. The official portal also sells paid reserved experiences and dome access, and the Vatican Museums with the Sistine Chapel are an entirely separate ticket and building.

How much are the Vatican Museums?

€20 at the ticket office, without an online reservation; €25 booked officially online (€20 admission + €5 reservation).

Can I visit both in one day?

Yes. They are around 25–35 minutes apart on foot, or a short bus ride. Pantheon in the morning and St Peter's in the afternoon works well.