Karlskrona is an outstanding example of a late-17th-century European planned naval city. The original plan and many of the buildings have survived intact, along with installations that illustrate its subsequent development up to the present day. The naval installations there has been declared as a UNESCO World Heritage Site.
Karlskrona was founded in 1680 was a major power in Northern Europe. Charles XI, the King of Sweden, issued a charter for the foundation of a new town on the islands of Wämö and Trossö, to be known as Karlskrona and to serve both as a port and as a naval base. The naval installations, beginning with a shipyard and storage facilities, were initially supervised by Erik Dahlbergh. The shipyard began with two building berths, two quays, two forges, and five warehouses; the first keel was laid down in December 1680 and the first ship launched the following year.
Karlskrona became a seat of government in 1683, the year in which Dahlbergh drew up the definitive plans for the town and its fortifications. By the time Gustav III took the throne by means of a coup d'état in 1772 it had become the third largest town in Sweden. The town has been damaged by fire, most severely in 1790. As a result, rebuilding of the destroyed buildings was carried out using stone and the original street layout was largely preserved.
The Second World War saw the modernization of some of the older fortifications and the installation of new facilities for defence against aerial attack. Since that time there has been a progressive diminution of activity in the naval area, although it still plays an active role in the Swedish defence system.
The plan of Karlskrona integrates strategic imperatives with the classical ideal. The Baroque layout with wide main streets radiating out from a central square lined with majestic public buildings is clearly discernible in the present-day town. It was planned by Erik Dahlbergh and Karl Magnus Stuart on the orders of the Lord High Admiral, Hans Wachtmeister.
The naval harbour is located to the south of the town, from which it was originally separated by an impressive enclosure wall, only small sections of which survive. To the south of the Parade Ground is Gamle Varvet (the Old Shipyard). This is made up of a number of fine buildings dating mainly from the late 18th century, commissioned by Frederic Henric af Chapman, Shipyard Admiral of Karlskrona from 1780 until his death in 1808 and many of them designed by this gifted master shipbuilder and architect. On the other side of Amiralitetsslätten is Artillerigärden (Artillery Yard), an area of reclaimed land housing barracks, ordnance storehouses, workshops, and a hospital. The point of land on which they were built is protected by the Aurora Bastion, dating from 1704.
References:Goryōkaku (五稜郭) (literally, 'five-point fort') is a star fort in the Japanese city of Hakodate on the island of Hokkaido. The fortress was completed in 1866. It was the main fortress of the short-lived Republic of Ezo.
Goryōkaku was designed in 1855 by Takeda Ayasaburō and Jules Brunet. Their plans was based on the work of the French architect Vauban. The fortress was completed in 1866, two years before the collapse of the Tokugawa Shogunate. It is shaped like a five-pointed star. This allowed for greater numbers of gun emplacements on its walls than a traditional Japanese fortress, and reduced the number of blind spots where a cannon could not fire.
The fort was built by the Tokugawa shogunate to protect the Tsugaru Strait against a possible invasion by the Meiji government.
Goryōkaku is famous as the site of the last battle of the Boshin War.