At the entrance to the museum there is a granite sarcophagus with a gabled lid from the late Roman period. The museum itinerary continues inside the underground rooms that made up the primitive crypt also illuminated by two round openings in the pavement of the Cathedral, two oculi that allow you to contemplate the luminosity of the great Renaissance dome.[4]
Some niches added in the 15th century to the walls of the crypt house portions of the floor mosaics (11th-12th century) of the medieval double cathedral found during the restoration works. Precious are the objects exhibited in the museum itinerary, among them a crosier in carved, painted and gilded elephantine ivory made by a Sicilian workshop by the hand of Arab craftsmen and dating back to the end of the 12th century. It depicts the coil of the ancient serpent defeated by the Lamb, Christ, by means of the Cross. The work, which belonged to the bishop of Pavia Pietro Grassi in the Middle Ages, belongs to a series of ivory artefacts spread throughout Europe and executed in Sicily in the 12th century by Arab artists who worked in the entourage of the court of Roger II and his successors.[5]
Some sculptures with a religious theme are also on display, including a Madonna and Child in painted terracotta, from the church of Santi Primo e Feliciano and the work of an anonymous Lombard master active between the end of the 16th and the beginning of the 17th century, silverware, including some that belonged to Bishop Fabrizio Landriani (1617-1642)[6] and a large illuminated parchment choir dating back to the last decades of the 15th century.
In the central hall of the museum there is the large panel, which was originally the crown of a polyptych now lost, by Lorenzo Fasolo depicting the Madonna della Misericordia who welcomes the members of the Disciplini Bianchi brotherhood under her cloak, a work executed between the first and second decade of the 16th century and coming from the church of Santi Giacomo e Filippo.[7]
Lombard master, Choirbook, 1480-1490.
Lorenzo Fasolo,
Our Lady of Mercy.
Monstrance, Lombard area (18th century).