The Museu Diocesà i Comarcal de Solsona houses multidisciplinary collections of historical and artistic heritage from the districts that make up the Roman Catholic Diocese of Solsona, from the Neolithic age to the 20th century. It includes examples of a wide variety of artistic techniques, painting, sculpture, metalwork, textiles, ceramics, forging, metalwork, etc.

The Museum vaults are located on the upper floor of the building and preserve heritage objects that make up the Museum’s collection not shown in the permanent exhibition halls. This other collection is divided into two broad thematic sections: archaeology and art.