The written history of Fållnäs estate begins in 1291, when it was donated to Skokloster abbey by Magnus Johansson (Ängel). The current manor complex was built between 1780 and 1807 according the design of Erik Palmstedt. It consists of several annexes, but the planned main building was never completed. Today Fållnäs hosts an art gallery with a cafe.
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.