Falerii Novi is a Roman town that lies halfway between Viterbo and Civita Castellana.
In 241 BC the Roman troops conquered the city of Falerii (modern Civita Castellana) and moved the people to the plains and founded a second, which was called Falerii Novi.
In the Republican period of the Gracchi, it was assigned to a colony of Roman citizens becoming ‘Colonia Junonia Faliscorum’ and in 90 BC, after the civil war, became a Municipium (a town subject to Rome but making its own laws) with internal administration entrusted to a board of ‘quadrunviri’ (four citizens having police and jurisdiction power). During the imperial age it was a very rich city and was equipped with public works and new temples.
In the third century AD with the spread of the Christian religion, it had its first martyrs with the saints Gratiliano and Felicissima and there are traces in the catacombs and, later, in hermitages and rock churches.
With the Barbarian invasions the population left the lowland areas and took refuge in the hills going partly to reoccupy the ancient hill of Falerii Veteres, today Civita Castellana, and partly to set up new safe haven.
In the abandoned city first a Benedictine and then a arose successively and then the current Romanesque church of Santa Maria in Falleri, in the twelfth century, made with recycled materials from the ancient Roman city.
The archaeological site has well-preserved city walls with square towers and a moat on the east side. The walls have nine gates defended at the sides by projecting towers. The main doors were at the ends of the two major perpendicular streets: the axes of the thistle and the decumanus.
The cardo was formed from the Consolar Via Amerina, built after 241 BC. The Jupiter gate is one of the first examples of use of the arch.
There are clear visible traces of the town, urban streets, the theatre, the amphitheatre and some mausoleums in Roman Concrete including the monumental L. Plotidius.