Haltdalen Stave Church was originally located in Haltdalen, but today it is on display at the Sverresborg museum in Trondheim. The church was probably built in the 1170s. The church on display is a rebuilt version of two churches from Ålen and Haltdalen. The western wall and the portal is from the old Ålen church. This is a single-nave stave church of the east Scandinavian-style, and it is the only one that is preserved.
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.