In a symbolic place of the Diocese - the spaces of the former Episcopal Seminary - the Museum of Sacred Art collects works mostly gathered from the deposits of the Curia for security reasons, which, coming from the city of Tortona and the wide diocesan territory, give the new Institute a fundamental peculiarity: to narrate the history of the Diocese through artistic production and provide a pastoral experience for the diocesan community and for the museum's visitors.

The venue is a historic building with its own physiognomy, which could not and should not be changed. The museum itinerary unfolds on three levels through a thematic and chronological route. The Museum, through a hinge room that complements the Library and the Historical Archive already present in the building, materializes the unity of the Diocesan Cultural Center and with it its role of ecclesial service.