Bokenäs Old Church is one of the most well-preserved medieval churches in Bohuslän. It was founded at some point in the early 12th century, and has been in use since. Except for parts of the interior, the weapon house from the 17th century, and the tower from 1752, most of the church is original. The church is open to the public daily during the summer, and for pre-arranged visits during the rest of the year, due to maintenance costs.
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.