Janowiec Castle was most likely built by Mikołaj Firlej between 1508 and 1526, on a steep Vistulan hillside in Janowiec. It expanded by his son, Piotr, the Voivode of the Ruthenian Voivodeship. The bastion, used as a residence, was destroyed by the Swedish army in 1655 during The Deluge.
Although the following owners of the castle did their very best to rebuild the castle, the castle never managed to regain its former glory. In 1928, an archaeologist, Leon Kozłowski had taken over the castle, but his plans to reconstruct the castle were stopped by the Second World War. After the Second World War, the castle was left in its former state, being one of many private castles. In 1975, the castle was bought by the Nadwiślańskie Museum in Kazimierz Dolny in Poland.
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.