The medieval hamlet of Malborghetto stands at the old intersection of the Roman roads known as the Via Flaminia and the Via Veientana, 19 kilometers (12 miles) north of Rome. Some of the town’s architecture is made up of older Roman structures that were reused, but medieval and later structures were built around an extraordinary piece: a forgotten triumphal arch. Located at the intersection of two roads, the Arch of Malborghetto is a quadrifons arch, or an arch that rests on four pylons with four openings, not unlike the Arch…