The Tempietto di San Fedelino is a 10th to 11th-century small, Roman Catholic sanctuary or church, located in a remote rural site at the south shore of the River Mera. The small church is made of local stone and has a rounded apse. It still retains some 11th-century frescoes. The frescoes resemble those from the apse of the church of San Vincenzo in Galliano (circa 1004–1007).
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.