 The see was at first suffragan of Bari, but in 1484 it became immediately dependent upon Rome.In 1818, it was enlarged with the territory of the suppressed diocese of Giovinazzo and diocese of Terlizzi, which were re-established in 1835, remaining united, "aeque principaliter".Pope Innocent VIII (Cibo) granted the diocese the privilege of being immediately subject to the Roman pontiff, without any other Metropolitan.