Nardò Cathedral has been since 1986 the episcopal seat of the diocese of Nardò-Gallipoli. The present cathedral probably stands on the site of a Byzantine church. In 1080, a church was built here by the conquering Normans, which was elevated to the status of a cathedral in the early 15th century.
The building has undergone a number of refurbishments. The present façade dates to 1710–1725. The interior contains both medieval frescoes and 19th-century frescoes by Cesare Maccari.
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.