Ferentium - Credit: Wikimedia Commons
Ferentium was a town of ancient Etruria, situated near the modern city of Viterbo in the northern part of the Roman province of Latium, now in modern Lazio. The city was also known as Ferentinum, Ferentum or Ferentia, and should not be confused with ancient Ferentinum (now Ferentino), which is in southern Lazio.On the various places with this or similar names, see Bill Thayer: Ferentum and Ferentinum. Read more on Wikipedia
Source: en.wikipedia.org