The archeological museum, at CAOS (Centro Arti Opificio Siri), is divided into two sections: pre-roman and Roman. The former of the two sections is particularly rich and fascinating, also for the fact that many of the findings come from around Terni. First of all, the funeral objects coming from the great necropolis, which stretched from the railway station as far as the site of the steelworks, used during the period that runs from the 10th to the 6th century before Christ. The museum also holds the complete reconstruction of a "bisoma" tomb discovered in the Pentima zone, named "Tomba di Sabina e Serapia" and is certainly unusual for the fact that it is a unique example of a couple being entombed together.
From other archeological sites in the Terni district come all those objects which shed a light on the daily life of the Naharki populations, the inhabitants of the Nera area. The Naharkis seem to have been a rather advanced community, and according to some theories, ancestress of Rome which it then founded after having sailed along the Nera and the Tevere (Tiber). These are framed by the objects that came to light during the excavation work carried out in the Piazza Clai area, and in the basement of some ancient city buildings, from the Maratta Bassa and Monte Torre Maggiore sites.
Obviously, there is no lack of interesting findings which have been unearthed ar Carsulae, and those from the excavations of the San Valentino necropolis. There are several statues, although some of them are seriously damaged, and the sarcophagus which are often inscribed with scenes of everyday life. Many of these findings belong to the Roman period and give the idea of a city, Interamna Nahars, as being rather wealthy. The "Cippi Carsulani" collection, quite singular burial monuments, which seem typical of the dominant culture, come from Carsulae. They represent, almost in miniature, larger burial monuments of which no other evidence remains and document in some way a certain degree of Greek influence. Among the sculptured stones there is space also for the remains of the foot of a statue, which, considering the size of the fraction remaining, must have been gigantic.
Among the findings from the Roman epoch there are numerous epigraphs and stems as well as objects of daily life; all material found by chance during normal maintenance work in various areas of the town centre, from ponte Garibaldi to the Cathedral area, around palazzo Spada etc.