The predecessor of the present Tüschenbroich Castle was built around 800. It stood on the large round motte in the present castle lake. This medieval castle however was completely destroyed during the Thirty Years' War (1618–1648).
Between the 17th and the 18th century the present castle was built on the site of the older outer ward.
In 1876 the southern tower and part of the main building collapsed during a storm. The remaining part was given a new facade and the collapsed part was never rebuilt. Of that southern tower only a ruin remains.
At present Tüschenbroich Castle is privately inhabited and can thus not be visited.
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.