The manor was first mentioned in 1323 as Alba Curia. It was constructed as a vassal castle in the Middle Ages. In the 1620s-1630s, it was rebuilt as a Renaissance palace, and slightly altered in the 18th and 19th centuries. In the 20th century, the estate belonged to the Soviet military forces, and the main building remained in ruins after a fire in 1993. In 2000-2002, the ruins were looted (the side portals were stolen, and rear wall broken along with the lion mascaron of the main portal, among other things).
Reference: Estonian Manors
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.