The museum Diocesano is housed in the old sacristy and rooms that surround the cloisters and behind the beautiful Palaeochristian church of Sant Eustorgio. There are many works of art from the Basilica dating to the 17th and 18th Century, together with engraved cupboards, relics, (such as the Santa Croce reliquary) sacred items and a few objects from the cemetery discovered under the Basilica. There are some canvases by Panfilo Nuvolone from the Procaccini and Vermiglio School.