Since 1986 Gravina Cathedral has served as a co-cathedral of the Diocese of Altamura-Gravina-Acquaviva delle Fonti. It was built here at the end of the 11th century by Humphrey of Hauteville, Count of Apulia and Calabria, and thus lord of the town. This church was destroyed in the years 1447-1456 by a fire followed by an earthquake, after being refurbished in a Renaissance-Romanesque style. Of the original church only a few Byzantine capitals and frescoes remain. The present cathedral was built in the thirty years following, under the supervision of the bishop Matteo d'Aquino.
The main façade has a large rose window. The altarpieces are made from 17th-century intarsia with polychrome marble and mother of pearl. The ceiling has framed canvases. The church has an altarpiece carved in Bitonto stone (1468) by Guido da Guida. There is a San Michele (1538) carved in mazzaro, a local stone, and attributed to Stefano da Putignano. Along the north nave is a Byzantine fresco of the Madonna del Piede. The oak choir-stalls were made in the 15th century and rebuilt by Bishop Antonio Maria Manzolio (1581-1593).
The adjacent sacristy has a ceiling refurbished by bishop Manzolio, and elaborate presses. The bell-tower was built from a Norman watch tower.
References:The Walls of Constantinople are a series of defensive stone walls that have surrounded and protected the city of Constantinople (today Istanbul) since its founding as the new capital of the Roman Empire by Constantine the Great. With numerous additions and modifications during their history, they were the last great fortification system of antiquity, and one of the most complex and elaborate systems ever built. They were also the largest and strongest fortification in both the ancient and medieval world.
Initially built by Constantine the Great, the walls surrounded the new city on all sides, protecting it against attack from both sea and land. As the city grew, the famous double line of the Theodosian Walls was built in the 5th century. Although the other sections of the walls were less elaborate, they were, when well-manned, almost impregnable for any medieval besieger.