Tombstones, altars, tombs, coins, bins, ceramics and glass from the Roman era have been found in almost all parishes of the municipality. These dates back to the first and fourth century, including the Roman road connecting Sintra and Peniche, which crosses Mafra, intersecting the Cheleiros, Mafra, Ericeira, Paço de Ilhas and S. Domingos da Fanga da Fé (where portions of the road have been conserved). In Cheleiros and Carvoeira there are two bridges constructed by the Romans. One of these, a bridge in Santo Isidoro (as well as a 100-metre portion of the road) that was part of the Sintra-Peniche accessway, is a reflection of the areas Romanization. An important agriculture centre during the Roman occupation, anthropologists have discovered Roman coins of the eras of Augustus (27 - 14 B.C.), Claudius (41 - 54) and Magnus Maximo (383 - 388). Although it is unclear the area's importance within Olissipo, its agricultural contributions may have contributed to its strong settlement during the period. Wine, oil and vegetables were easily commercialized across the accessway and along the rivers of Cheleiros, Ilhas and Safarujo, which were navigable until the Middle Ages.