Jurisics Castle, named after Croatian nobleman Nikola Jurišić. The oldest part was built in the 13th century. The inner castle originally of Gothic style was extended later on. This building complex served as an estate castle and was also converted in the Renaissance and Baroque era. The character of the two islands still can be observed: it is visible that the fortress and the interior of the castle were surrounded by a moat.
During the Little War in Hungary, Pargalı İbrahim Pasha under the command of Suleiman the Magnificent laid siege to the castle in 1532. Jurišić and less than 1000 men defended the castle for 25 days without any artillery, despite 19 assaults.
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.