The earliest fortifications in Pillau were made in 1550, when it was an important port of the Duchy of Prussia. During the Thirty Years' War, the Swedes occupied the harbour in the aftermath of their victory over the Polish-Lithuanian Commonwealth. King Gustavus Adolphus landed there with his reinforcements in May 1626. After the ceasefire of Altmark (1629) the Swedes retained Pillau and set out upgrading its fortifications. They constructed a star fort which remains one of the town's landmarks. The final completion of the fortress was made by Prussians in 1670.
In June 1807 Pillau was stormed by Napoleon's Grand Army. No outstanding events took place during the rest of the 19th century. Records of a Scottish 'Colony' established here in 1815 appeared in a 1890 Publication, although their authenticity is questionable.
The lighthouse was built up to a height of 31 meters, and the entire fortress was updated and rebuilt by the Prussians in 1871. Currently it is holding a naval museum.
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.