A borg (Dutch pronunciation: [bɔr(ə)x]; Gronings: börg) is a former stronghold or villa in the province of Groningen, Netherlands.
A comparable building in the neighboring province of Friesland is called a stins.
A borg usually started as a brick building, a 'steenhuis' (literally meaning 'stone house'), built in the 13th or 14th century.
There is one original steenhuis left in Groningen, the Iwema-steenhuis in Niebert.
A good example of a borg that originated from a steenhuis is the Fraeylemaborg.