EN
Home / Tours / Pantheon and Basilica of Neptune

Gyde Tours · Piazza della Rotonda

The rooms behind the Pantheon

You see the Pantheon with an interactive audio guide, then a guide takes you into the Basilica of Neptune, the Roman hall built onto the back of the rotunda, whose rooms only opened to visitors in November 2025. It's the one tour here that shows you something most visitors walk straight past.

Pantheon and the Hidden Basilica of Neptune

About this experience

Behind the Pantheon, on Via della Palombella, stands a wall of Roman brick with a carved frieze of sea creatures. That is the Basilica of Neptune, a hall first raised under Agrippa and rebuilt under Hadrian, right against the back of the rotunda. Its rooms opened to the public on 25 November 2025 as Oltre il Pantheon (Beyond the Pantheon): marble fragments taken from the rotunda, frescoes, an 8th-century ciborium, scale models and a video mapping of the oculus.

Gyde Tours packages that with the main building. Your host waits by the west corner of the Pantheon, beside the special entrance. You get skip-the-line Pantheon tickets and about 40 minutes with an interactive audio guide, which surprised more than one guest by how good it was. Then come 30 minutes guided in the Basilica di Nettuno, with its own entry ticket included. One guest's guide there was an archaeologist.

Caveats. With 11 reviews, the 5.0 rating rests on a small sample. The listing warns it's not for anyone with claustrophobia, and you bring your own headphones and a scarf to cover up. Under-18s are listed in the infant band, so check the price for teenagers. And Turismo Roma lists the Oltre il Pantheon route until 31 December 2026: for a 2027 trip, check that the Basilica is still part of the offer before you book.

  • The Basilica of Neptune: rooms open to visitors only since November 2025
  • Pantheon entry and Basilica entry in one booking
  • A live guide for the Basilica, 15 guests at most
  • Interactive audio guide for the rotunda
  • From $17, a few dollars more than an audio-guide ticket

How the day runs

  1. BeforeMeet by the west corner

    Your host stands at the west corner of the Pantheon, right beside the special entrance. The listing says you can also go in on your own with the instructions sent with the tickets.

  2. About 40 minThe Pantheon with audio

    Into the rotunda with your ticket and the interactive audio guide on your phone.

  3. About 30 minThe Basilica of Neptune

    A guide leads you through the rooms behind the rotunda: Roman masonry, marble fragments, models and the later church furnishings.

  4. On the way outThe fountain

    You pass the fountain on Piazza della Rotonda as you leave.

A small vaulted room in the hidden spaces behind the PantheonA scale model of the Pantheon in the Basilica of Neptune roomsA display of medallion portraits in the rooms behind the rotunda

What's included

Included

  • Pantheon tickets (skip-the-line)
  • Interactive audio guide for the Pantheon
  • Guided tour of the Basilica of Neptune
  • Entry ticket for the Basilica of Neptune
  • Free cancellation up to 24 hours before

Not included

  • Meals
  • Headphones
  • Scarves to cover shoulders
  • A live guide in the Pantheon itself (audio only)

Who it suits

Book it if

  • You've seen the Pantheon before and want something new
  • You like archaeology more than selfies
  • You want a guide for the part that has no signs
  • You're on a budget but want more than a ticket

Skip it if

  • You get claustrophobic in small rooms
  • You want a live guide under the dome: book the Elite Guided Tour
  • You're visiting in 2027 and the Basilica dates aren't confirmed yet
  • You're bringing teenagers and the infant band confuses the price

What guests say

★★★★★

Highly recommended! I had an amazing visit to the pantheon. Especially the special access to the pantheon while skipping all the long queues. Also the Neptune Basilica is definitely under visited and I would absolutely recommend the guides.

Viator traveller · Viator review
★★★★★

This tour is a MUST and one that so many people miss. The guide was an archeologist and very passionate. Seriously, this is worth every penny.(we didn’t have to queue!!!)

Viator traveller · Viator review
★★★★★

I decided to buy it on a whim and LOVED it. Audioguide was the best one I have used yet, not only it just let us know where to go but also gave me fun facts.

Viator traveller · Viator review

Tips before you book

  • Bring headphones and a scarf. Both are on the listing's "not included" list.
  • Look up at the back wall of the Pantheon on Via della Palombella before you go in. The marine frieze is the Basilica's calling card.
  • The official Oltre il Pantheon route is sold on the Musei Italiani portal too. It launched at €10 on top of the Pantheon ticket, with English tours at 11:30 and 12:30 Monday to Saturday and 15:30 on Sunday.
  • The Basilica route doesn't run on the first Sunday of the month, the Pantheon's free day.
  • Charge your phone: the Pantheon half runs on an audio app.

Read next:

Frequently asked questions

What is the Basilica of Neptune?

A Roman hall built against the back of the Pantheon, first under Agrippa and rebuilt under Hadrian. Its rooms opened to visitors on 25 November 2025 as the Oltre il Pantheon route, with marble fragments, frescoes, models and a video mapping.

Do you go inside the Pantheon on this tour?

Yes. You enter the Pantheon with skip-the-line tickets and an interactive audio guide for about 40 minutes, then join a guide for about 30 minutes in the Basilica of Neptune.

Where do I meet the host?

By the west corner of the Pantheon, right beside the special entrance. The tickets also come with instructions for entering on your own.

Is it suitable for children?

The listing books adults from 18 and puts everyone under 18 in the infant band. It warns against the tour for anyone with claustrophobia. Check the price for your children on the booking page.

Ready to book

Book Pantheon and Basilica of Neptune

Skip-the-line Pantheon entry with an audio guide, plus a guided visit to the Roman Basilica of Neptune behind it.

Compare with

Plan your date before you go

Skip-the-line Pantheon entry with an audio guide, plus a guided visit to the Roman Basilica of Neptune behind it.

Check dates for the Basilica of Neptune tour