Saint Nicholas church in Dearsum is a Romanesque church from c. 1200 with a 13th-century tower build out of red brick. In the 16th century four large windows where added to the south side. The Pipe organ was built in 1895 by the Gebroeders Ademaand was restored in 1916 and 1983 by Bakker & Timmenga.
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.