Campell Castle was probably begun in the early 13th century for the knightly von Campell family. The first mention of the family is from 1289 when Egeno de Campelle appears in a record. The original castle was a four story bergfried. In the 13th or early 14th century it was expanded with a ring wall, gatehouse, ditches and a drawbridgeon the west side and a residential wing on the east. However, the Campell family died out in the 14th century. In 1389 the Bishopric of Chur recorded that Bishop Hartmann granted lands that used to be the Campell fief to Hans and Gottfried von Ehrenfels. Though the grant probably did not include the castle, because it wasn't until 1418 that the Bishop granted the castle to Hermann von Schauenstein-Ehrenfels.
During the 15th century, the west wall was raised and had a roof added. The original tower had two more stories added and was topped with crenelations. A large cistern was excavated to the north. Around the middle of the 15th century the castle was given to the Ringg family, but in 1500 it was returned to the Schauenstein family, so it is unclear who renovated the castle.
In the 16th century it was once again rebuilt. The west wall and zwinger were roofed over and became a three story palas. The old gate in the west was walled up and a new one was added in the south wall. The west wall was extended northward to protect the castle's flank.
In 1562 the Schauenberg-Ehrenfels sold the castle to Hans Faschau. A few years later, in 1567, he sold it to Hercules von Salis, whose family held the castle for almost a century. During the Bündner Wirren of the Thirty Year's War the castle was damaged by fire. The west palas was rebuilt in 1635, while the east residential wing was abandoned and became a stable.(Bauphase 5) In 1647 the Salis family sold it to the Freiherr von Schauenstein-Fürstenau. By 1700 it was abandoned, but remained in good condition. By 1900, it had fallen into ruin when the Abula line of the Rhaetian Railway was built over the outer moat. In 1932 the Campell family bought the castle. Between 1993 and 1998 the ruins were stabilized, repaired and excavated and they opened to visitors in 2001.
Much of the castle is still standing. The original tower stands in the center of the complex. At the foot of the tower is an arched doorway that leads to the eastern wing of the castle. Both the tower and the east wing have retained their medieval character. The west palas was built after the castle had ceased being a fortification and had become a nobleman's house and so has large windows which would have lit comfortable rooms.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.