 The area Archi was already inhabited as early as the 11th-7th centuries BC, as testified by the Bronze Age Fonte Tasca site, whose defensive works still existed in the Hellenistic age.In the Middle Ages, Archi was a fortified center that, together with Casoli and Roccascalegna, constituted a defensive triangle that blocked the passage from the eastern Maiella to the Sangro valley

In the Norman period, the town was entrusted to two soldiers managed by one Marsilius Trogisii.Later, Charles I of Anjou gave it for thirty ounces a year to one Berardo.