The archeological remains stand out as silent witnesses of a remote, glorious past, when Iuvanum was the economic and administrative center of the area inhabited by the Samnite population called Caraceni. The most ancient buildings, dating back to the late 3rd and 2nd centuries BC, are two temples on top of a hill, the nearby acropolis and an ancient theater down that same hill. There are still big fragments of a wall of the 4th century BC, built in Majella rocks, which surrounded the temple.
After the end of the social war in the 1st century BC Iuvanum became an important political and administrative center of the Roman Empire. Most of the buildings on the plateau date back to the Roman period: the forum, the tabernae, the basilica and the private homes. In the year 346 AD a terrible earthquake hit the Samnium province, and also the giant walls of Juvanum collapsed; those that we see now were rebuilt after that earthquake. And in later centuries as with most Roman town in Abruzzo stones were taken from the local people to build their own homes.