The ruins of Rooslepa chapel originate from the 17th century. It was originally built as a wooden chapel. The present stone chapel was built in 1834. The chapel fell apart after World War II, but the sanctuary was recommemorated in August 2007. The chapel has a brand new belfry with the ball and weathervane. The weathervane depicts a whale with its toothed mouth open.
Reference: Visit Estonia
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.