San Pietro Caveoso is a Catholic worship place situated in the Sassi of Matera. The front is in baroque style and presents three portals. Over each portal there is a niche with statues. The side niches are surmounted by two rectangular windows and the central one by two single-lancet windows. There is a rose window and a bell tower with a pyramidal cusp on it.
The central nave ceiling is adorned with pictures of 'Jesus and Saint Peter' and 'Saint Paul's conversion'. The 18th century altar has a wooden polyptych dating back to 1540, painted by an anonymous artist from Matera. The church originally had eight chapels, but the right four were demolished to build the oratory. In the fourth left chapel there is a baptismal font from the 13th century. It is 17.2 m width and 43 m long and has a deep choir.
The church has been recently consolidated, with a project about soil consolidation and general anchorage of the macro-elements of the building, and between the building and the foundation rock.
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.