San Francesco is a romanesque-Gothic-stylechurch in the city of Potenza. The church was erected in 1274 with a tall Gothic facade with a large circular window. The 16th-century portal has the monogram of St Bernardino da Siena.
Among the artworks are a fresco depicting Martyrdom of St Sebastian (1545-1566) by Giovanni Todisco of Abriola. On the right wall is a stone tomb of Donato De Grassis (1534). The walls have 14th-century frescoes of St Clare and St Francis.
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.