Santa Maria dei Greci is a gem of the Agrigento old town centre including impressive works of art dating back to the 14th century. This rather interesting gothic church was built on the site of an older site, a 5th century Doric Temple dedicated to Athena. The foundations from the older site have been excavated and you can see them through a glass floor.The church was named Greek because, during the Byzantine domination, was a greek-orthodox cathedral. The current sacred building dates from the twelfth-thirteenth century and it has a simple and strict facade characterized by a Gothic style. The entrance is adorned with a remarkable ogival portal, and the interior has three naves. The church includes precious works of art and frescoes made by some of the most important local artists in the 14th century.
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.