The Museo Diocesano occupies the upper floors of the Palazzo del Seminario dei Chierici on the south side of Piazza del Duomo. The collection covers liturgical objects, treasury items from the cathedral, paintings and devotional objects from churches around the diocese.
The standout exhibits are the silver reliquaries used in the Sant'Agata procession and the access to the cathedral roof terraces, which give an excellent close-up view of the Vaccarini dome and the wider city. About an hour.