The Archaeological Museum of Casteggio and Oltrepò Pavese was born in 1974 by a group of enthusiasts, following the discovery of two Roman tombs in the city center. Thanks to the acquisition of new exhibits, donations by private individuals, the excavations of the Archaeological Superintendence of Lombardy, the museum was expanded in 1988. In 1999, following the restoration of Palazzo Certosa, the museum was transferred and amplified further. The Museum houses a rich variety of archaeological finds: geological, paleontological, prehistoric, proto-historic, Roman era, the late ancient and medieval times. There is also a section that houses the materials donated by private citizens to the City of Casteggio. They are objects of origin Oltrepò Pavese and partly from Italy Central and South America. The museum is at the forefront for educational activities and seminars focused on archaeological disclosure that reflect all the most important historical stages of ancient civilization.