Barletta Cathedral (Italian: Duomo di Barletta, Concattedrale di Santa Maria Maggiore) is a Roman Catholic cathedral in Barletta, Apulia, southern Italy. Formerly the seat of the archbishops of Barletta and Nazareth, it is currently a co-cathedral in the Archdiocese of Trani-Barletta-Bisceglie. It was built in two different styles, Romanesque and Gothic, from the 12th century to the 14th century.
The church occupies the site of ancient hypogeum structures dating from the late 4th-early 3rd centuries BC, attributed to an ancient temple dedicated to Neptune. From the 6th century AD a first palaeo-Christian basilica existed here, having three naves with a central apse, five meters under the current cathedral. After the destruction of the ancient Canosa by Muslim raiders, numerous clerics moved to the Barlettan church, which was renamed as Santa Maria de Auxilio: the 9th century structure had a Latin cross plan, with a pavement mosaic of which traces exist today.
A Romanesque church was built over the pre-existing one in Norman times (12th century), known as Sancta Maria Majoris. Late in the same century the bell tower was also raised, and the capitals of the cyborium were executed by oriental artists. Later the matronei, the mullioned window and the rose window of the western façade were added. The new church was consecrated in 1267. It had a nave and two aisles, divided by two rows of six granite columns and two final pillars. In the 13th century two bays and three semicircular apses (similar to those in Trani Cathedral) were also added.