The Korppoo Church was erected probably between years 1430 and 1440. It represents the oldest church architecture in Finland. Good example of this is the stone tower, which was probably built for defensive purposes, not for belfry. When the church was renovated in 1952-1953, several overpainted medieval wall paintings were found overpainted and restored.
The oldest wooden statue in Finland, "Korppoon madonna", was originally in the Korppoo Church. It was made in Rheinland approximately in 1225. Today the statue is preserved in National Museum of Finland (Helsinki).
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.