Ehrenfels Castle was probably built in the first half of the 13th century. The first mention of the Lord of Ehrenfels is in 1257. In 1320 it was owned by Burkhard and Rudolf von Schauenstein, who also used the name Ehrenfels or Herrenfels. They probably expanded the simple bergfried with residential space and a ring wall around that time. The castle was first mentioned in 1423 with Hermann von Ehrenfels as the owner. Toward the end of the 15th century or in the early 16th century it was given to Cazis Monastery, but the Schauenstein-Ehrenfels family continued to occupy it. During the 16th century the castle was renovated and rebuilt into a more comfortable palas.
However, by 1600 Ehrenfels was abandoned and began falling into ruin. Parts of the castle were demolished for building material, and when the Ehrenfels-Schauenstein male line died out in 1742, only a ruin remained. In 1933 it was acquired by the Schweizerische Burgenverein (Swiss Castle Association) and converted into a youth hostel. Since the conversion was done without archeological investigation or records, much of the history of the castle was lost. In 1954 Swiss Youth Hostels bought the castle from the Association. It remains in operation today with 38 beds.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.