Arch of Malborghetto

Is it worth the trip?

For most visitors to Rome, only with a reason. This is not a free-standing marble arch; it is a Roman brick core inside a farmhouse rebuilt in the 16th century, and you have to read it to see it. What it offers is the story: tradition places it where Constantine camped before his victory over Maxentius in 312, and connects it with the vision he is said to have had on the eve of the battle (Pleiades; the ministry). If that story is why you are in Rome, or you are driving the Flaminia anyway, it is free and worth the stop. Plan around the opening calendar, because the building is not open every day.

Getting there

The building stands at Via Barlassina 1, in the Malborghetto area of the municipality of Rome, about 30 m from the Via Flaminia (OpenStreetMap). The ministry names Sacrofano station on the Roma Nord urban railway as the stop for the site; no source gives the walk from it, and no bus stop or car park is mapped beside the building.

Entry is free and individual visitors need no booking; groups of more than ten are asked to write ahead (the ministry). The ministry’s listing gives the opening hours as Thursday to Sunday, 09.30 to 18.30, with last entry an hour before closing, but it also refers to a monthly calendar of openings published by the Soprintendenza Speciale di Roma, and it announces individual days as special openings (cultura.gov.it, read 21 October 2026). Check that calendar, or call +39 06 33625595, before making the trip.

History

The arch was a tetrapylon, an arch with openings on all four sides, comparable in appearance and size to the so-called Arch of Janus in the Velabrum in Rome. Its four arches spanned the crossing of the Via Flaminia, running north–south, and the Via Veientana, running east–west (it.wikipedia); Pleiades describes the second road as the link between the Via Tiberina and Veii. The plan was rectangular, 14.86 by 11.87 m, standing on travertine pier bases, and it is thought to have been about 18 m high. It may have had columns on two or four of its faces under a heavy entablature, and a flat-roofed attic divided inside into three rooms (it.wikipedia).

Its date was worked out in the early 20th century by the German archaeologist Fritz Toebelmann, who studied the building for five years and found a brick stamp of Diocletian’s time under the plaster of the central vault, so the arch cannot be earlier than that reign. Toebelmann, who died in the First World War, was the first to argue that it marked the place where Constantine’s troops camped before the clash with Maxentius rather than the battlefield itself; because marking a camp would be unusual, scholars have suggested it may be linked to the vision Constantine is said to have had on the eve of the battle. Later studies by Gaetano Messineo largely confirmed his conclusions (it.wikipedia). The ministry puts it this way: after the victory of 28 October 312, the Senate raised the arch by the Colosseum in 315, and perhaps the one at Malborghetto too.

The building’s later life is the reason it survives. In the 11th century it became a fortified church dedicated to the Virgin, with the four openings closed and an apse added on the east side, and the road was diverted round it; in the 13th century it was taken into the walls of a fortified village (the ministry; it.wikipedia, which dates the church only to “perhaps” the 11th century and gives 1256 as its first documentary mention). Wrecked in the 15th-century feuding of the Orsini, it became a farmhouse and took the name Malborghetto. In 1567 it was rebuilt by Costantino Pietrasanta, a Milanese apothecary (Petrasanta in the ministry’s text), and it still largely looks as he left it; it later served as an inn and a coaching station (it.wikipedia; the ministry). It passed to the state in 1982 and, after restoration, now holds the museum (the ministry).