Assunta)[1] is a Roman Catholic cathedral in the city of Bitonto in the Province of Bari, Italy.
The 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.
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 main artwork is the marble ambo, a combined pulpit and lectern, of 1229, a masterpiece of medieval Apulian stonecarving.