Going up to the second floor you are surrounded by other archaeological remains belonging to the Grosseto area, from Prehistory up to late Ancient Age. In this section you can find documents from the Palaeolithic to the Iron Age, followed by an exhibition of Oriental-style objects, but also many documents from the Archaic Age, some of them about commerce, together with Etruscan, Greek and Carthaginian amphorae.
The first two floors of the building are full of archaeological finds, whereas the rest of the structure is dedicated to sacred art. The Diocesan Museum has been connected to Archaeological Museum since 1975 and contains private collection of the founder, Monsignor A. Cappelli. All the works of art taken from diocesan churches are valuable and were mostly painted by Sienese artists.
The Last Judgment of the 13th century is attributed to Guido da Siena, the Cristo in Pietà by Pietro di Domenico (late 15th century), the Madonna di Girolamo di Benvenuto (early 15th century), the Madonna delle Ciliege made by Sassetta (mid-fifteenth century) from the Cathedral of San Lorenzo. The last rooms of the museum present the history of the city of Grosseto.
The journey ends visiting the fifth section of the museum dedicated to history of Grosseto with archaeological finds that date back to Classical Age.