[citation needed] The Romans defeated the Samnites here, at the Passo della Portella: in the place a fortified gate was built, which was later used as the border customs of the Kingdom of Naples.

The first document mentioning the Castrum Monticelli, however, dates from 1099, from the archives of Monte Cassino.

In the winter of 1788 the town was sacked by the French army, while, after the Bourbon restoration and the subsequent unification of Italy, the neighbourhood was the base of brigandage.

The pork sausages are particularly distinctive, usually handmade from the meat and lard of the pig, mixed with chilli pepper and coriander seed.

The plains of Monte San Biagio, south of Monti Ausoni, are primarily used for agriculture including the growth of kiwi, olives, pears, citrus fruits, and many types of vegetables.