The museum is set up in a former palace of the old town and has numerous materials found on Sezze territory since the 19th century.Following excavations by the Superintendence for Archaeological Heritage of Lazio and private donations;the collection has been enriched with a wide range of exhibits dating from the Paleolithic and the Middle Ages:lithic industry;pottery and metal objects from houses and necropoli;architectural and votive terracotta and bronze statuettes from places of worship;an epigraphic collection and a numismatic collection from the Roman era.There is also a small gallery with some interesting works.Worthy of note:vases decorated with geometric designs engraved by the Grotta Vittorio Vecchi (Bronze Age);a fragment of terracotta pediment decoration with a semi-naked figure lying down and a polychrome mosaic floor decorated with cubic perspective from the first century BC;daily artifacts from the ancient post station of Forum Appi;St.Francis in adoration of the Virgin;a canvas by Orazio Borgianni of the Caravaggio school.