Rumlaborg castle was built around 1360 - the first written record dates from 1366. In 1434 it was burned down during the so-called Engelbrekt rebellion and rebuilt again in 1448 by Karl Knutsson Bonde. In the 17th century the castle lost its defensive purpose and in 1850s the site was moved as a park with pavillion.
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.