Rome Layover: Colosseum and Pantheon From FCO

Rome’s Santa Maria Maggiore is seven minutes on foot from Termini station, the Colosseum two stops beyond it, and the Pantheon, the Trevi Fountain and Piazza Navona are strung across the old centre to the west.

Santa Maria Maggiore’s fifth-century mosaics

Of the four papal basilicas, this is the one you can reach on foot from Termini in seven minutes, and the nave is free to walk into. Above the columns, in a band running the length of it, are mosaics laid in the 430s: Old Testament scenes in glass tesserae, small and high up and easy to miss if nobody tells you they are there.

In April 2025 the basilica gained something it had not had in a very long time. Pope Francis asked to be buried here rather than in the Vatican grottoes, beside the icon of the Salus Populi Romani he visited before and after every journey, and he was: a plain slab of Ligurian marble in the left aisle, between the Pauline and Sforza chapels, with one word cut into it, FRANCISCUS. He is the first pope in more than a century to be buried outside the Vatican, and the queue for that corner of the aisle is now often longer than the one for the mosaics.

There is a security check at the door and the usual basilica dress code, shoulders and knees covered. The brick campanile outside is the tallest in Rome at 75 metres.

The Colosseum and the Arch of Constantine

Metro line B reaches Colosseo station from Termini in about five minutes, two stops, on the standard 1.50-euro ticket that stays valid for 100 minutes. You come up the stairs facing it.

Standing outside costs nothing, and for a lot of people on a few free hours that is the sensible version. The outer arcade is what everyone pictures, and the Arch of Constantine is right beside it: a triumphal arch put up in 315 to mark Constantine’s victory at the Milvian Bridge, built partly out of sculpture stripped off earlier monuments, so the reliefs on it are two centuries apart in places.

Going inside is 18 euros and covers the first and second levels with their panoramic terraces, plus the Roman Forum and the Palatine Hill, valid 24 hours with one entry to each. It is timed, and slots are released 30 days ahead, so a walk-up on the day usually is not an option in summer; you can book a combined entry slot in advance through a tours and activities platform if you want it settled before you land. One thing to know before you get to the gate: security here refuses suitcases and large wheeled bags outright, and there is no cloakroom inside for them.

The Pantheon’s open oculus

On a small square in the old centre that gives no hint of what is on it, the Pantheon has been standing since about 126. Hadrian rebuilt it on the site of Agrippa’s earlier temple and left Agrippa’s dedication on the portico, which is why the inscription credits a man who had been dead a century when the current building went up.

Inside, the dome spans 43.3 metres and is still the largest unreinforced concrete dome ever built, nineteen centuries after the pour. The oculus at its top, about nine metres across, is a genuine hole: no glass, no cover. Rain falls straight through onto the marble floor, which was built with a slight slope and a set of drains to take it away, and on a wet day you can stand and watch it come down inside the building.

Entry is 7 euros, raised from 5 in July 2026, with reduced admission at 2 euros for EU citizens aged 18 to 25 and free entry for under-18s. It opens daily 9am to 7pm, with the ticket office shutting at 6pm. Booking timed entry ahead of the day through a tours and activities platform is worth it if you are arriving in the middle of the afternoon, when the square outside backs up.

The free Roman Forum viewpoint on Via del Campidoglio

Via del Campidoglio is the lane that runs behind Palazzo Senatorio at the top of the Capitoline hill. It is barely a road, and halfway along it the parapet on your left drops away and the entire Roman Forum opens up underneath.

The Arch of Septimius Severus is directly below, the eight surviving columns of the Temple of Saturn stand to the right of it, and the Palatine rises at the far end with the Colosseum closing the view behind. There is no gate, no ticket and no opening hour: it is a public street with a full view over the Forum, no ticket needed. If your stop is short enough that 18 euros and a booked slot are not worth it, this is what you go and see instead.

The square you cross to reach it is Michelangelo’s, laid out in the 1530s with its oval paving and the ramped staircase up from Piazza d’Aracoeli.

The Trevi Fountain is free from the piazza above

Ten minutes east of the Pantheon, Nicola Salvi’s fountain fills the whole end wall of a small square, finished in 1762 and fed by the Aqua Virgo, an aqueduct that has been bringing water into this part of Rome since 19 BC.

Since February 2026 the bottom of it has been ticketed. Two euros gets you down onto the stone steps at the water where the coin-throwing happens, with residents, under-sixes and disabled visitors with a companion going free. The piazza above the steps is not ticketed at all: you can stand there, see the entire facade, take the photograph everyone takes, and pay nothing. The charge also lifts overnight, from 10pm to 8am, which is a useful thing to know if your flight is a late one and you would rather be at the basin than behind the railing.

The stadium shape under Piazza Navona

With more than five hours to spend, Piazza Navona is worth the extra stretch into the old centre: a long oval square whose shape is not a design decision. It sits directly on the Stadium of Domitian, an athletics track built in AD 86 for around 30,000 spectators, and the buildings around the edge stand on the line of the old seating tiers, which is why the square is 240 metres long and curved at one end.

Bernini’s Fountain of the Four Rivers is at the centre, finished in 1651, four river gods around an Egyptian obelisk representing the Nile, Ganges, Danube and Río de la Plata. Borromini’s church of Sant’Agnese in Agone faces it across the square. The whole thing is open ground and costs nothing to walk through, which makes it a good last stop before turning back east.

The last airport train out of Termini leaves at 23:05

The Leonardo Express runs from 04:50 to 23:05 out of Termini and from 05:38 to 23:27 out of Fiumicino, a non-stop 32 minutes each way for 14 euros. After the last one there are night buses, but they are a slower and less pleasant way to end a day. From the old centre, allow around two hours to the gate: the metro or the walk back to Termini, up to fifteen minutes on the platform, 32 on the train, then check-in and security at the far end.

A separate regional service to the airport costs 8 euros and takes about the same time, but never touches Termini: it runs instead to Roma Trastevere, Roma Ostiense and Roma Tiburtina, each the start of its own layover guide on a different side of the centre. Termini itself also handles the high-speed lines, with a train reaching Florence in about an hour and a half, several times an hour.

If you get back to the station with time in hand, there is one more thing worth five minutes. On Piazza della Repubblica, a short walk from Termini, the basilica of Santa Maria degli Angeli e dei Martiri is built inside the frigidarium of the Baths of Diocletian, a conversion Michelangelo took on in 1563 and did not live to finish. Set into the floor is a 45-metre bronze meridian line, laid by the astronomer Francesco Bianchini in 1702 for Pope Clement XI to check the Gregorian calendar against the sun. A small hole high in the south wall throws a disc of light onto it, and at solar noon that disc crosses the bronze. Entry is free; it opens 8am to 1pm and 4pm to 7pm on weekdays, from 10am at weekends.

Which is the practical reason to leave the suitcase near Termini rather than wheel it round the centre. The Colosseum’s security is the one door on this route that will turn a large bag away outright, the basilicas all screen bags at the entrance, and every stop here comes back within a metro ride of the station the airport train leaves from.