Ostia Antica Rome: Complete Guide to the Forgotten Ancient City

Thirty minutes from Rome Termini by train, a city of 100,000 people is frozen in time. Its streets are intact. Its apartment buildings stand four and five storeys. Its baths, warehouses, theatres and temples survive with extraordinary completeness. And on any given morning, you can walk through it almost alone.

Ostia Antica is the Roman Forum without the crowds. It is one of the finest archaeological sites in Europe, and most tourists in Rome never go.

What Ostia Antica Is

Ostia was the ancient harbour city of Rome the point at which the grain ships from Egypt, the wine from Spain, the olive oil from North Africa unloaded their cargo before it was transported up the Tiber to the capital. At its peak in the 2nd century AD, Ostia had a population of 50,000–100,000 people and was the commercial hub of the western Mediterranean.

When the harbour silted up and the economic function shifted to the new port at Portus (built by Claudius and expanded by Trajan), Ostia declined. By the 6th century it was largely abandoned. The silt that had killed the harbour also preserved the city, burying it under a layer of earth that protected it from the quarrying that stripped Rome's own monuments over the medieval centuries.

Excavations began seriously in the 19th century and continue today. Approximately 35 of the city's estimated 60 hectares have been excavated.

What to See

The Decumanus Maximus — the main street of the city — runs the entire length of the excavated area from the city gates to the ancient waterfront. Walking its length, lined on both sides by ancient buildings in various states of preservation, is the central experience of Ostia Antica.

The Thermopolium — an ancient snack bar, complete with its marble counter, painted panels advertising the food on offer, and a fresco of the menu above the serving area. It is the most vivid domestic survival of Roman urban life anywhere in the excavated world.

The Square of the Corporations (Piazzale delle Corporazioni) is a large open square whose portico was occupied by the offices of approximately 70 shipping companies from across the Roman world. The floor of each office contains a mosaic identifying the company — an elephant for the African grain traders, a lighthouse for the Alexandrian shippers, fish for the fishmongers. It is one of the great documentary survivals of Roman commercial life.

The Theatre is largely intact and seats approximately 3,000 people. Performances are occasionally staged here in summer — check the Ostia Antica website for the programme.

The Apartment Buildings (insulae) are the most remarkable survival in Ostia. Several stand to four or five storeys — the height of ordinary Roman urban housing — with staircases, doorways, and window openings largely intact. Walking through them gives a genuinely visceral sense of what Roman urban life felt like.

The Baths of Neptune contain spectacular floor mosaics depicting Neptune and sea creatures — among the finest Roman mosaics outside of Pompeii.

The Museum at the site entrance houses the finest objects recovered from the excavations: statues, mosaics, portraits, and domestic objects that would otherwise remain invisible beneath the ruins.

How to Get There

From Roma Termini, take Metro B to Piramide station, then transfer to the Roma-Lido train line (Ferrovia Roma-Lido). The journey to Ostia Antica station takes approximately 35 minutes total. The site entrance is a 5-minute walk from the station.

Trains run approximately every 15 minutes. A standard ATAC ticket (the same used for buses and metro in Rome) is valid for the journey — available at P.Stops InfoPoints across the city.

Practical Information

The site opens at 9am. Allow a minimum of 3 hours; a full morning or afternoon gives the best experience. Entry is €12 for adults; free for EU citizens under 18.

The site is large and exposed in parts — bring sunscreen, comfortable shoes, and water. The café near the museum is adequate for lunch but basic; packing food is recommended for a full day visit.

Why Ostia Antica Beats the Roman Forum

The Roman Forum is extraordinary — but it is also surrounded by 20,000 other tourists, scaffolding, and the background noise of modern Rome. Ostia Antica is quiet. Its preservation is more complete. Its domestic architecture — the apartment buildings, the bars, the bakeries — gives it an intimacy the Forum, with its monumental temples and triumphal arches, cannot match.

If you have already seen the Colosseum and the Forum, Ostia Antica is the next logical step: a deeper, quieter, more personal encounter with the Roman world. Take the train, fill your RomAntica bottle at the water dispenser at the nearest P.Stop before leaving Rome, and spend a morning walking a city that has been waiting two thousand years to be rediscovered.