# Baths of Diocletian, Rome

> The Baths of Diocletian were ancient Rome's largest, built in AD 298–306 for up to 3,000 bathers at once. Michelangelo turned their vast cold hall into the basilica of Santa Maria degli Angeli, free to enter. Other halls house the National Roman Museum and Michelangelo's cloister (about €10–12). It's five minutes from Termini station; allow 1–1.5 hours.

Web page: https://yesgo.io/italy/rome/baths-of-diocletian

- City: [Rome](https://yesgo.io/italy/rome), Italy
- YesGo score: 42/100 (Yes, if nearby)
- Time on site: 1 h
- Entry: Basilica free; museum ≈ €10–12
- Opening hours: Museum Tue–Sun ≈ 9:30–19:00, closed Monday; basilica daily with a midday break
- With kids: Fine with kids
- Santa Maria degli Angeli: Free
- Baths museum: ≈ €10–12 combined National Roman Museum ticket
- Museum hours: Tue–Sun ≈ 9:30–19:00
- Museum closed: Mondays
- Time needed: 1–1.5 hours with museum and basilica
- Location: Piazza della Repubblica; 5 minutes from Termini, Metro A Repubblica
- Coordinates: 41.90278, 12.49833
- Facts checked: 10.11.2026

## Key facts

- **AD 298–306** — built under emperors Diocletian and Maximian (source: English Wikipedia)
- **≈ 13 ha** — the complex — Rome's largest baths (source: English Wikipedia)
- **≈ 3,000** — bathers at a time (source: English Wikipedia)
- **1563** — Michelangelo converted the frigidarium into a basilica (source: English Wikipedia)
- **1702** — Francesco Bianchini laid a meridian line in the floor (source: English Wikipedia)
- **Piazza della Repubblica** — follows the curve of the baths' exedra (source: English Wikipedia)

## Tickets and hours

The basilica of **Santa Maria degli Angeli is free**. The museum in the other halls uses the **National Roman Museum combined ticket**, valid for several days and covering [Palazzo Massimo](https://yesgo.io/italy/rome/palazzo-massimo) across the road, Palazzo Altemps and the Crypta Balbi — about **€10–12** according to guides. The museum opens **Tuesday to Sunday** and closes on **Mondays**.

## A short history

Emperors **Diocletian** and Maximian built the baths in **298–306** on the Viminal Hill — the largest bathing complex Rome ever had: about **13 hectares**, up to **3,000 bathers**, twice the [Baths of Caracalla](https://yesgo.io/italy/rome/baths-of-caracalla). There were hot and cold halls, a vast pool, exercise yards, libraries and gardens.

Later buildings grew inside the ruins: **Piazza della Repubblica** with its Naiad Fountain follows the curve of the baths' **exedra**, the round church of **San Bernardo alle Terme** sits in a corner tower, and even **Termini** station takes its name from the baths nearby.

## Michelangelo's basilica and the meridian

In **1563** Pope Pius IV asked the 86-year-old **Michelangelo** to turn the ruins into a church. He destroyed almost nothing, reusing the vast **frigidarium** with its vaults and eight red granite columns over 13 metres tall. The result, **Santa Maria degli Angeli e dei Martiri**, is one of Rome's most spacious churches — and from outside it's just a brick wall with a niche, with no façade at all.

Set into the floor is a bronze **meridian** laid by astronomer **Francesco Bianchini** in **1702**: at solar noon a beam through a hole in the wall falls on the line, once used to fix time and date, with zodiac signs in coloured marble along it.

## The museum

The **National Roman Museum** fills other halls. The highlight is **Michelangelo's cloister**, a huge Carthusian courtyard ringed by arcades of statues, sarcophagi and inscriptions. The galleries hold one of the world's great **epigraphic collections** — thousands of Latin inscriptions on Roman daily life — and displays on early Latium.

## What to see

- **Santa Maria degli Angeli** — the frigidarium reworked by Michelangelo.
- **Bianchini's meridian** — the bronze line in the basilica floor.
- **Granite columns** — eight ancient columns of the frigidarium.
- **Michelangelo's cloister** — arcades filled with ancient sculpture.
- **Epigraphic collection** — thousands of Latin inscriptions.
- **Piazza della Repubblica** — the baths' exedra and the Naiad Fountain.
- **San Bernardo alle Terme** — the round church in a bath tower.

> **One ticket, four museums** The combined National Roman Museum ticket lasts several days and opens the Baths of Diocletian, Palazzo Massimo across the road, Palazzo Altemps near Piazza Navona and the Crypta Balbi. Start with Palazzo Massimo — the best frescoes and mosaics — then cross to the baths.

## How to get there

1. From **Termini** station, 5 minutes on foot across Piazza dei Cinquecento.
2. Metro line A to **Repubblica** — the exit is on Piazza della Repubblica.
3. Buses 40, 64, 70 and 170 to Piazza della Repubblica.
4. [Santa Maria della Vittoria](https://yesgo.io/italy/rome/santa-maria-della-vittoria) is 5 minutes' walk away.

## Is it worth visiting?

Yes: Michelangelo's basilica is free and astonishing in scale, and the meridian is a rare astronomical curiosity — catch it around noon on a sunny day. The museum is good value, especially on the combined ticket. It's the best way to spend an hour near Termini before a train.

## Before you go

Tick off what's ready — your ticks are saved in this browser.

- [ ] Visit the basilica around noon on a clear day
- [ ] Buy the combined National Roman Museum ticket
- [ ] Make sure it isn't a Monday
- [ ] Find the meridian in the floor
- [ ] Cross to Palazzo Massimo

## Rome's museums: compare and choose

Museums in Rome rated by YesGo.

- [Sistine Chapel](https://yesgo.io/italy/rome/sistine-chapel) — YesGo score 64/100 (Yes, go) · 30 min · Vatican Museums ticket ≈ €25
- [Castel Sant'Angelo](https://yesgo.io/italy/rome/castel-sant-angelo) — YesGo score 57/100 (Yes, go) · 1 h 30 min · ≈ €15–20
- [Domus Aurea](https://yesgo.io/italy/rome/domus-aurea) — YesGo score 49/100 (Yes, if nearby) · 1 h 15 min · ≈ €18, with VR ≈ €26
- [Ara Pacis](https://yesgo.io/italy/rome/ara-pacis) — YesGo score 47/100 (Yes, if nearby) · 1 h · ≈ €13–15
- [San Luigi dei Francesi](https://yesgo.io/italy/rome/san-luigi-dei-francesi) — YesGo score 47/100 (Yes, if nearby) · 20 min · Free
- [Galleria Borghese](https://yesgo.io/italy/rome/galleria-borghese) — YesGo score 45/100 (Yes, if nearby) · 2 h · ≈ €18
- [Vatican Museums](https://yesgo.io/italy/rome/vatican-museums) — YesGo score 44/100 (Yes, if nearby) · 3 h · ≈ €25
- [Capitoline Museums](https://yesgo.io/italy/rome/capitoline-museums) — YesGo score 43/100 (Yes, if nearby) · 2 h 30 min · ≈ €15–19.50
- [Baths of Diocletian](https://yesgo.io/italy/rome/baths-of-diocletian) — YesGo score 42/100 (Yes, if nearby) · 1 h · Basilica free; museum ≈ €10–12
- [Galleria Doria Pamphilj](https://yesgo.io/italy/rome/doria-pamphilj) — YesGo score 39/100 (Yes, if nearby) · 1 h 30 min · ≈ €16–18
- [Palazzo Farnese](https://yesgo.io/italy/rome/palazzo-farnese) — YesGo score 39/100 (Yes, if nearby) · 1 h 15 min · Paid, booking only
- [Imperial Fora](https://yesgo.io/italy/rome/imperial-fora) — YesGo score 38/100 (Yes, if nearby) · 1 h · Free from the street; museum ≈ €13–15
- [Palazzo Barberini](https://yesgo.io/italy/rome/palazzo-barberini) — YesGo score 37/100 (Yes, if nearby) · 2 h · ≈ €15
- [Villa Farnesina](https://yesgo.io/italy/rome/villa-farnesina) — YesGo score 37/100 (Yes, if nearby) · 1 h · ≈ €12
- [Palazzo Massimo](https://yesgo.io/italy/rome/palazzo-massimo) — YesGo score 34/100 (Yes, if nearby) · 2 h · ≈ €10–12 combined ticket
- [MAXXI](https://yesgo.io/italy/rome/maxxi) — YesGo score 32/100 (Yes, if nearby) · 2 h · ≈ €12–15
- [Ostia Antica](https://yesgo.io/italy/rome/ostia-antica) — YesGo score 31/100 (Yes, if nearby) · 3 h · ≈ €12–18

## Baroque around Repubblica

Palazzo Barberini, Borromini's San Carlo alle Quattro Fontane, Bernini at Santa Maria della Vittoria and the Baths of Diocletian.

1. [Palazzo Barberini](https://yesgo.io/italy/rome/palazzo-barberini) — YesGo score 37/100 (Yes, if nearby) · 2 h · ≈ €15
2. [San Carlo alle Quattro Fontane](https://yesgo.io/italy/rome/san-carlo-alle-quattro-fontane) — YesGo score 46/100 (Yes, if nearby) · 20 min · Free
3. [Santa Maria della Vittoria](https://yesgo.io/italy/rome/santa-maria-della-vittoria) — YesGo score 46/100 (Yes, if nearby) · 20 min · Free
4. [Baths of Diocletian](https://yesgo.io/italy/rome/baths-of-diocletian) — YesGo score 42/100 (Yes, if nearby) · 1 h · Basilica free; museum ≈ €10–12

## Don't mix it up

The Baths of Diocletian aren't the Baths of Caracalla, which are in the south by the Appian Way. Santa Maria degli Angeli isn't Santa Maria Maggiore, though both are near Termini.

## Tips

- Michelangelo's basilica is free.
- The meridian is best around noon.
- One ticket covers four museums.
- The museum closes on Mondays.

## Questions

### How much are the Baths of Diocletian?

The basilica is free; the museum uses the National Roman Museum ticket, about €10–12.

### What are the opening hours?

The museum opens Tuesday–Sunday around 9:30–19:00; closed Monday.

### What did Michelangelo do at the Baths of Diocletian?

In 1563 he turned the cold hall into the basilica of Santa Maria degli Angeli.

### What is the line in the basilica floor?

Bianchini's 1702 meridian, struck by a sunbeam at solar noon.

### Where are the Baths of Diocletian?

On Piazza della Repubblica, 5 minutes from Termini.

### How long do you need?

1–1.5 hours with museum and basilica.

## How we checked

History of the baths, basilica and meridian from English Wikipedia. The combined ticket price and museum hours weren't confirmed on the official site — hence the 'checking' badge.

## Sources

- National Roman Museum (Museo Nazionale Romano, Italian Ministry of Culture)
- English Wikipedia, Baths of Diocletian and Santa Maria degli Angeli e dei Martiri

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