 The territories of Upper Samnium were conquered by the Romans following the Samnite Wars, and the area around Circello became "Ager publicus", that is public land belonging to the Roman people.Excavations in the area, in particular in the Macchia district, demonstrate the Roman presence in Circello.Just a few kilometers from the center of Circello, there is an archaeological site at what was once the capital of Ligures Baebiani, a population of Ligurians who were deported from their homeland in 181 BC under the orders of the Roman consul Marcus Baebius Tamphilus, from whom (following Roman custom) they took the name "Baebiani".