Pelplin Abbey is a former Cistercian abbey founded in 1258 by Sambor II, Duke of Pomerania. It was a daughter house of the Cistercian Doberan Abbey. It was first sited in Pogódki (Pogutken) near Kościerzyna (Berent) and re-located in 1276 to Pelplin. By decree of the Prussian government of 5 March 1823 it was dissolved. Since 1824 the church, as Pelpin Cathedral, has been the cathedral of the Roman Catholic Diocese of Pelplin. Work on the Brick Gothic building (length 80 m, height 26 m) began in 1289. The church was finished in 1323; additional work was completed in 1557.
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.