Naval Station Holmen is one of several naval stations of the Royal Danish Navy, supplementing the two Danish naval bases in Frederikshavn and Korsør.
Founded in the late 17th century it is also a visitor attraction with many historical buildings that has played a vital role in the history of Denmark as well as Copenhagen. The naval base used to occupy the entire area of Holmen, which was in fact created by a series of landfills to house it, but is now confined to its northernmost island of Nyholm.
Holmen was for many years the base of command for the Danish Naval Flag and has through the times been called Nyholm (which is the name of one of the islands), the Navy’s Base and Naval Station or Naval Base, Copenhagen. It was never actually named Naval Station Holmen (Flådestation Holmen), even though many people not in the Navy have used this name. For over 300 years, Holmen was Denmark’s largest employer. Today the Navy only has a single institution left on Holmen. SInce the 1990s, the area has been opened to the public.
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.