Karlstad cathedral, which replaced an earlier one in a different location that was destroyed by fire, was built in the 1730 by design of Christian Haller. It is constructed of natural stone and brick which is plastered over. It took around sixty years to complete the interior decorations. The church, which is in a baroque style, has some neo-classical features. It has a light interior.
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.