The city of Dürnstein and Dürnstein castle ruin are connected by a wall. The castle was built between 1140-1145 by Hadmar I Kuenring and blasted by Sweden under General Torstenson in 1645. You can see a model of the city and the ruins at Dürnstein Abbey.
Dürnstein castle is known from the legend about Richard the Lionheart. The legend tells, that the English King Richard the Lionheart tore up the Austrian flag on the return journey of his crusade and refused to share the spoils of war with Leopold V. Sure, Leopold V. held the English king in the castle 1192-1193. The Royal prisoner could receive travelling singer (troubadours) for his entertainment, resulted in probably later the legend of Blondel singer. His faithful minstrel moved from Castle to Castle, until he discovered his King in Dürnstein, by singing a song verse, the prisoner added. Richard the Lionheart was released after a ransom of 150,000 Silver marks in freedom.
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.