Skepptuna was built of bricks and stone in the early 1200s, but it was destroyed by fire around 1300. During the restoration the church was enlarged. The altar screen with medieval paintings is the most valuable artefact in Skepptuna Church. It was done in Brussels and bought to Sweden after 1500. The font dates also from the early 1500s.
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.