Written references to the Szigetvár castle date back to 1449, but it is thought that the central and oldest part of the castle would have been erected in the 14th and 15th centuries, by Janos, son of Anthimus, while in public office in Slavonia.
The castle is a national symbol of the tragic resistance against invading Turkish armies, whose forces vastly outnumbered those of the Hungarians. In 1566, when defending the castle was no longer a viable option, the castle's defenders, under the command of their captain, the Croatian Miklós Zrínyi, stepped out of the castle to face their destiny in what was to be a heroic battle against the Turks. This act of heroism has been commemorated on many occasions in Croatian and Hungarian literature, as well as in many paintings and sculptures.
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.