Bitonto Cathedral, dedicated to Saint Mary, was the seat of the small Bishopric of Bitonto from the bishopric's foundation, believed to be in the 8th century, until 1818, when it was combined with the neighbouring Diocese of Ruvo to form the Diocese of Ruvo e Bitonto. This was separated again in 1982, and the Diocese of Bitonto, with Bitonto Cathedral as its seat, was briefly revived, but was combined with the Archdiocese of Bari in 1986 to form the Archdiocese of Bari-Bitonto, in which Bitonto Cathedral is now a co-cathedral.
The remains of a palaeochristian church, which predates by some centuries the establishment of the bishopric, have been discovered underneath the present building.
The existing church however is a Romanesque building of the late 11th-12th centuries, influenced by the Basilica of San Nicola in Bari. The west front is divided into three parts and has three portals (the central one of which is sculpted with plant motifs and scenes from the Old Testament), four mullioned windows and a rose window flanked by sculptures of animals supported by small columns. The interior has a nave and two aisles, and is also notable for its sculpture. The main artwork is the marble ambo, a combined pulpit and lectern, of 1229, a masterpiece of medieval Apulian stonecarving. In the crypt is a tile of a griffin, a survival from the predecessor church building.
References:Duino Castle was built by the Wallsee family in 1389 on the cliffs overlooking the Gulf of Trieste. It replaced an older castle from the 11th century. Over time, the Wallsee family disappeared and the castle, after having been used as a prison, became the residence of the Luogar and Hofer.
At the end of the 19th century it became the property of Prince Alexander von Thurn und Taxis from the Czech branch of the House of Thurn and Taxis. It remains with the family to this day with his great-grandson Prince Carlo Alessandro della Torre e Tasso, Duke of Castel Duino the current owner. The castle has been opened to the public as a museum and park.