Marinmuseum (Naval Museum) is Sweden's national naval museum, dedicated to the Swedish naval defense and preservation of the country's naval history. Marinmuseum is one of Sweden's oldest museums, established in 1752 when King Adolf Frederick began the collection and documentation of naval objects in what was called the Model Room (Modellkammaren). He also ordered the preservation of ship models and ship building machinery.
The rectangular building design includes a pier which extends into the water. Around the pier are several museum ships. A specially designed underwater tunnel with windows provides a way to view the wreckage of several seventeenth century ships.
Figureheads from Swedish ships are on display, including many that were made by sculptor Törnström, royal sculptor to the navy, who worked at the Karlskrona shipyard during the 1700s. These include the figurehead of the ship the Dristigheten. The Marinmuseums Archives include 4,000 drawings and maps, mostly relating to the Sweden's Naval history; there are also pictures, paintings, and models. Subjects include submarines, shipbuilding strategies, battle tactics, and life on board ships of the Baltic Sea.
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.