Narni is a city and hill town in the south of the Italian region of Umbria. It lays claim to being the geographical center of Italy, although this claim is also made by nearby Rieti. It rose to importance in ancient Roman times by being on the Via Flaminia, the road that connected Rome with Rimini. In Roman times the city was known as Narnia, but it is not certain that this is where C.S. Lewis got the name for his Chronicles from.
From Rome take the A1 Autostrada as far as Orte. Then head east on the E45 highway and Narni is about 25km.
There are trains from Rome on the line to Ancona. If coming from the north (e.g. Florence), you can change at Orte station.
Narni Scalo station is a few km from the main town. Bus services are available.