Английская Википедия:Folkenborg
Folkenborg (sometimes known as Folkinsberg) is a former nobles estate from the 12th-13th century located one mile southeast of Mysen located in Østfold. It is famous for being the site where King Haakon IV of Norway was born.[1] In 1225 Haakon stayed here during his war with Värmland which means that it was either a royal property or his own personal property. Since most of the royal property was inherited by Skule Bårdsson it is likely to have been a Patrimony probably from his mother Inga. Despite some spellings as -berg the proper spelling is -borg because berg would imply a mountain but there is none on the site. Instead it is more likely that there was a Borough (Borg) which could range from a walled settlement to a fortified house. Folkenborg is referred to as a "homestead"[2] and was thus probably a fortified manor house.
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