Whether you'd like to pray or find out about the history of the building, Santa Maria Maggiore Cathedral is a worthwhile site to visit. Check to see if this sanctuary is open to tourists to experience the calmness inside.
When you've spent a bit of time at this Gioia del Colle house of prayer, why not check out Terra Jovia, Norman-Swabian Castle of Gioia del Colle, and National Archeological Museum? They're near Santa Maria Maggiore Cathedral and also a hit with many tourists.