Opposite Termini stands an enormous wall that looks like part of the station’s backdrop. It is what remains of the Baths of Diocletian, the largest thermal complex built in Rome. To grasp its scale, do not picture it from a plan. Walk inside.
A cloister as large as a piazza keeps sarcophagi and statues beneath its portico; a little further on, a bath hall has become the church of Santa Maria degli Angeli. Even Piazza della Repubblica still follows the curve of the ancient exedra.
The Baths of Diocletian tell not only of Rome’s size, but of the way a city reuses what outlives it. We begin in the cloister and with the inscriptions, stones that seem silent until you learn how to read them.
What do those stones say once they cease to be mere fragments?
Let’s begin!
1. The great cloister, attributed to Michelangelo
The cloister measures a hundred metres on each side, an outsized measurement for a cloister: it looks like a piazza with a garden in the middle.
The design was entrusted to Michelangelo in 1561, three years before his death, which is why you find it everywhere called the “Michelangelo cloister.” With one caveat: Michelangelo died in 1564 and the cloister was built afterwards, starting in 1565. The attribution is old and widespread, but it is not a documentary certainty, which is why it is written “attributed to.”
Under the portico today you see what has become a storeroom turned museum. Along the walls, on low plinths, hundreds of pieces are lined up: sarcophagi with mythological scenes, reliefs, marble heads fixed to the wall, Corinthian capitals set back on column shafts, altars and boundary stones. In the garden, on the gravel, further architectural fragments sit out in the open.
What difference does it make to see sculptures this way rather than in a hall?
You see them in daylight, with real shadow that shifts through the day and changes their face. A relief carved for the open air, under a spotlight, tells a lie; under a portico, it does not.
2. The Hall of Inscriptions
This venue houses the Museum of the Written Communication of the Romans, and the collection numbers around ten thousand Latin inscriptions. It is the reason scholars come here and tourists do not, and it is also the part that changes how you read Rome for the rest of your trip.
The Hall of Inscriptions gathers the inscriptions of everyday, social and political life: contracts, dedications, lists of magistrates, posted laws, epitaphs of ordinary people. These are not the great imperial texts, they are the notes a city wrote on itself.
The reward here is understanding that writing was a mass medium. The Romans wrote on tombs, on monuments, on walls, on amphorae, on bricks, on water pipes: anyone walking through Rome moved through a continuous text. After this hall, every inscribed slab you meet at the Roman Forum stops being a piece of decoration and becomes a sentence someone wanted you to read.
3. The Hall of Sculptures
The second hall of the inscriptions section changes medium and stays on the same theme: here are displayed the imperial busts and statues of deities, the faces that went with those texts.
Walk through it slowly and watch how the portraits change from one emperor to the next: the hairstyles, the beards, the way the pupils are carved. These are variations of court fashion, and they work like a calendar, since a Roman portrait is dated first of all by its hairstyle.
This hall does for the inscriptions next door what no text can do on its own: it puts a face to the names that signed them. That is why the two halls are next to each other and are not meant to be seen apart.
4. The Hall of Gold and Jewels
The last space is the smallest and the least expected: a hall of Roman funerary goldwork, the jewellery buried with the dead.
After three halls of marble and stone the scale changes at once: from sarcophagi to objects that fit in one hand. It is exactly that jump that makes the hall worth its ten minutes, because these are the only objects in the museum that a person actually wore.
What is closed, and why it matters to know beforehand
Here is the warning I promised in the opening, and it concerns three spaces.
Until further notice the Natatio, Hall VIII and the Museum of the Protohistory of the Latin Peoples are closed. The museum states no reopening date.
The most keenly felt loss is the first, and understanding it takes a distinction of vocabulary that many guides get wrong. In a Roman thermal complex the natatio is the open-air swimming pool, an outdoor basin of huge size; the frigidarium, on the other hand, is the great covered cold hall. They are not synonyms, and at the Baths of Diocletian they are two different spaces with two different fates: the natatio is closed to the public, while the frigidarium can be visited for free, because it has become a church, as I cover below.
And how tall were these baths, really?
The frigidarium that became a church
Leave the museum, walk around to Piazza della Repubblica and go into Santa Maria degli Angeli e dei Martiri. That gigantic transverse nave, with its granite columns and cross-vaults, was not built as a nave from scratch: it is the baths’ frigidarium, the covered cold hall, converted into a church in the sixteenth century.
Two things to know before you go. First: it is the fastest way there is to gauge with your own eyes the true height of the ancient baths, because the floor was raised but the vaults are the original ones, making it the only space in the complex where you still walk under a Roman ceiling. Second: the church has free entry and is not part of the museum ticket, but its opening hours are those of a church and shift with services, so check them separately.
And when you are in Piazza della Repubblica, look at the curve of the porticoes: the square follows exactly the profile of the exedra of the ancient baths, and you only realise it after seeing the complex from inside.
The other three venues included in your ticket
The admission ticket is valid for three other venues, each with a different collection from this one.
- Palazzo Massimo alle Terme is directly across the way, on the other side of Piazza dei Cinquecento: two original Greek bronzes, the painted garden from the Villa of Livia, the Lancellotti Discobolus and the Grottarossa mummy. The two venues fit into the same morning.
- Palazzo Altemps, behind Piazza Navona, houses the antiquities collections of Roman nobility in a Renaissance palace with frescoed rooms.
- Museum of Rescued Art occupies a hall of this same complex, the Octagonal Hall, and shows on rotation the works recovered from illicit trafficking.
How the four venues fit into a single visit is explained in the article on the National Roman Museum.
Practical information
Details verified on 13 September 2026 on the official website of the National Roman Museum. Before you travel, check again on museonazionaleromano.it, because prices, hours and partial closures change without notice.
The closed venue. The Crypta Balbi, the museum’s fifth venue, is temporarily closed to the public, with no reopening date announced. The single ticket still includes it on paper, so anyone buying it expecting four venues finds three plus the Octagonal Hall.
Tickets. There is no admission ticket for the Baths of Diocletian alone: you buy the single ticket of the National Roman Museum, which costs 15 euros full price and 2 euros reduced, reserved for European Union citizens aged 18 to 25, and allows one access to each venue within a week of the first entry. Holders of a valid pass from the Musei in rete network pay 10 euros. The MNR Card costs 30 euros full price and 20 euros reduced and gives unlimited access for a year from first use, with no limit on visits. Tickets are not refundable.
Opening hours. The venue is open Tuesday to Sunday, 9:00-19:00, with last entry at 18:00, and is closed on Mondays.
What you will not see. The Natatio, Hall VIII and the Museum of the Protohistory of the Latin Peoples remain closed until further notice. The cloister, the inscriptions section and the Hall of Gold are open.
Free admission. Entry is free on the first Sunday of the month; other conditions are published on the official website. The church of Santa Maria degli Angeli, occupying the frigidarium, is always free and does not require the museum ticket.
Getting there. Metro lines A and B stop at Termini, and line A also stops at Repubblica: both are under five minutes on foot. The entrance is at Via Enrico de Nicola 79.
How much time to allow. The cloister and the two halls of the inscriptions section take an hour and a half. Add twenty minutes for the Hall of Gold and half an hour if you cross the square and go into Santa Maria degli Angeli, which I recommend doing in the same visit.
Temporary exhibitions. The current programme is checked again every month in the Rome exhibitions table: the article covers the permanent collection, the table shows what has been added.
If you would rather buy in advance, you can book entry to the National Roman Museum online and see the available slots. It is the combined ticket described above, valid for a week across all the open venues.
What to see nearby
This is the point in Rome where the ancient and the station touch, and there are three things within a ten-minute walk.
The first is Palazzo Massimo, directly opposite and already included in your ticket. The second is the Museum of Rescued Art in the Octagonal Hall, in the same complex and visitable in about half an hour. The third is Piazza della Repubblica with the Fountain of the Naiads, which follows the curve of the ancient exedra.
If instead you want to see an imperial thermal complex that has stayed a ruin rather than become a museum, the right move is to leave the centre and go to Hadrian’s Villa at Tivoli, where the thermal buildings remain within their landscape.
Photo credits: cloister of the Baths of Diocletian by Lalupa (CC BY-SA 4.0); walkway of the cloister by Szilas (public domain), from Wikimedia Commons.
