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| Onstaborg | |
|---|---|
| Sauwerd, Netherlands | |
 Onstaborg | |
  Onstaborg | |
| Coordinates | 53°17′42″N6°31′52″E / 53.2949°N 6.5312°E |
| Type | Borg |
| Site history | |
| Built | Was known to exist as early as 1325 |
| Demolished | 1725 |
Onstaborg was a borg in the northeast Netherlands. It was located in Sauwerd, Groningen. The borg was founded in or before 1325 [1] by the family Onsta (also known as Onseda, Onsitha or Onsatha). The Onsta family belonged to one of the oldest and most prominent families of the Ommelanden. The Onsta family also owned an Onstaborg in Wetsinge.
A borg is a former stronghold or villa in the province of Groningen, Netherlands. Borgs used to belong to noblemen or prominent citizens. A comparable building in the neighboring province of Friesland is called a stins.
The Netherlands is a country located mainly in Northwestern Europe. The European portion of the Netherlands consists of twelve separate provinces that border Germany to the east, Belgium to the south, and the North Sea to the northwest, with maritime borders in the North Sea with Belgium, Germany and the United Kingdom. Together with three island territories in the Caribbean Sea—Bonaire, Sint Eustatius and Saba— it forms a constituent country of the Kingdom of the Netherlands. The official language is Dutch, but a secondary official language in the province of Friesland is West Frisian.
Sauwerd is a village in the municipality of Winsum, Groningen, Netherlands. Until the local government reorganization of 1990 the village was the head of the former municipality of Adorp.
