The Diocesan Museum is housed in the elegant rooms of the current Bishop's Seminary, built starting in 1610. The Museum, created with the aim of narrating the experience of the church of Molfetta, Ruvo, Giovinazzo and Terlizzi, today represents an important cultural reference point for the entire territory.
In the 1830s, Monsignor Filippo Giudice Caracciolo arranged for museum rooms to be set up in the seminary. Following various renovations and expansion of the museum, since 2009 the collections have been arranged on three exhibition floors and organised into sections: archaeology, sacred vestments, lapidarium, statuary, sacred furnishings and picture gallery. On the first floor, the Bishop's Seminary Library is also included in the tour.