The "Via Flaminia" starts at Porta del Popolo in the Aurelian Walls of Rome: Via del Corso ("Via Lata"), which connects the Campidoglio to the gate, can be considered the urban stretch of the "Via Flaminia". The road then runs due north, considerable remains of its pavement being extant under the modern road, passing slightly east of the site of the Etruscan "Falerii" (Civita Castellana), crossing the Tiber into "Umbria" over a bridge some slight vestiges of which can still be seen, the "Pile d' Augusto". From there it made its way to "Ocriculum" (Otricoli) and "Narnia" (Narni), where it crossed the Nera River by the Ponte d'Augusto, the largest Roman bridge ever built, a splendid four-arched structure to which Martial alludes, one arch of which is still standing. It went on, followed at first by the modern road to "Casuentum" (San Gemini) which passes over two finely preserved ancient bridges, through "Carsulae" to the "Vicus Martis Tudertium" (near modern Massa Martana), then "Mevania" (Bevagna), and thence to "Forum Flaminii" (S. Giovanni Profiamma). Later, a more circuitous route from "Narnia" to "Forum Flaminii" was adopted, increasing the distance by 12 Roman miles (18 km) and passing by "Interamna Nahars" (Terni), "Spoletium" (Spoleto) and "Fulginium" (Foligno) — from which a branch diverged to "Perusia" (Perugia).