The archaeological museum, set in the nineteenth-century Court Palace, is divided in two sections. The former describes the history of Interamnia between the twelfth century B.C. and the seventh century A.D., exhibiting remains from archaeological sites such as the theater, the amphitheater and the Roman domus, like the so called "House of the lion", with its remarkable mosaic. Some of the objects on display in this part of the exhibition are particularly noteworthy, first and foremost the precious white-marble Roman sculptures, among which a portray of the emperor Septimius Severus. The latter section illustrates the history of the environment, where the Pretutians and Picenians settled, from the prehistory to the Middle Ages.