The area has been inhabited since prehistoric times and there are remains of megalithic walls of the Volsci. The first people to arrive were peaceful Etruscans followed by the warlike Volsci from Fucino.
Around Monte Meta fortified positions were created, including L’Arx Fregellana today, Rocca d’Arce, to guard the Valleys of the Liri and Sacco rivers and in defence of the Comino Valley and the mining area of Meta.
The Fregellae of the Volscians, not be confused with the Roman, were important in ancient times, especially in the military and defensive matters and were active until the Middle Ages.
In 350 BC, the Samnites took over from the Volscians and began to clash with the Romans who destroyed the Fregellae Volsca. To beat the Samnites, the Romans founded Fregellae on the left bank of the Liri causing the Second Samnite War, which lasted from 328 to 304 BC. After the Roman defeat at the hands of Samnite Ponzio Erennio, at the Caudine Pass, the Samnites regained Volscian Fregellae.
In 313 BC, the Romans retook control of the Liri Valley and recaptured the Volscian Fregellae without fighting, since the Samnites had abandoned the garrison at night. The Volscian Fregellae ceased its function until the Middle Ages when the struggle began between the Swabians and Normans, French and Spanish, the Popes and Noblemen.
The town was formed in the Middle Ages around a castle built on a cliff from where it controlled a large territory on the border between the southern states and the Pontifical State.
With this position they gained an enormous strategic importance in the struggles between the Papacy and the Empire and it was repeatedly occupied and devastated.
Rocca d’Arce entered the Duchy of Sora and was ruled by the families of Cantelmos, the D’Avalos, Della Rovere (1475) and Boncompagni (1612).