Valle del Liri

Before the Roman conquest and the Latin colonization, the valley was inhabited, by the Volsci, of Indo-European origin, but unlike the Latins, belonging to the Osco-Umbrian family and therefore culturally closer to the other Italic populations of Apennine Italy.

Following the Roman expansion in Lazio, the Liri River initially became the border between the territory under the control of Rome and the Samnite one.

The main local lordships, which in any case orbited Naples, were the county, (later duchy) of Sora and the Terra Sancti Benedicti,[2] the latter feudal domain of the Montecassino abbey.

In 1927 with the creation of the province of Frosinone, the region south of the Liri also became part of Lazio.

In contemporary times, particularly from the nineteenth century, the Valley was dotted with important paper production centers.