San Michele Arcangelo is a romanesque-style church in the city of Potenza. A church at the site is first documented in 1178, however, floor mosaics, likely from the 5th century, uncovered in the church suggest that a late Roman structure was likely here before then. As was common for many Lombard churches, it was dedicated to St Michael Archangel. The stone portal has a sculpted relief of the Madonna and Child with some Franciscan Order symbols.
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.