Co-cathedral of Sant'Eustachio Martire

The Cathedral of Altamura was built by Emperor Frederick II (1220-1250) in 1232 and became one of the most venerated sanctuaries in Puglia. In 1248, under pressure from Emperor Frederick, Pope Innocent IV declared Altamura exempt from the jurisdiction of the Bishop of Bari, making it a Palatine Church, one of the four in Puglia. The current orientation of the church is the opposite of the original, although it is not known whether the change dates back to the reign of Robert of Anjou (early 14th century) or to the enlargement carried out in 1521-1547. From the 18th century onwards, the upper parts of the two bell towers and the small gallery separating them were added. Since 1986, the church has been the seat of the Bishop of Altamura-Gravina-Acquaviva delle Fonti.

The present cathedral of Bari dates back to the 12th-13th century. It was built on the ruins of a cathedral of Byzantine origin, destroyed by William I of Sicily (1154-1166). The materials of the previous church and other destroyed buildings were used for the construction of the present building. Consecrated on October 4, 1292, the church was inspired by the style of the Basilica of St. Nicholas.

The Basilica of San Nicola is one of the most significant examples of Apulian Romanesque architecture. The basilica was founded in 1087 by Benedictines with the main purpose of receiving the relics of St. Nicholas stolen in Myra (Turkey) by sailors from Bari.