| Landsöhr Castle | |
| Native Name: | Burg Landsöhr, Burg Landseer, Bertaburg |
| Built: | first recorded in 1502 |
| Type: | hill castle, spur castle |
| Condition: | burgstall (no above-ground ruins) |
| Location: | Bad Boll |
| Coordinates: | 48.6233°N 9.6273°W |
| Map Type: | Baden-Württemberg#Germany |
| Code: | DE-BW |
Landsöhr Castle (de|Burg Landsöhr), also called Landseer Castle (Burg Landseer) or Bertaburg, is a lost spur castle on a northern spur,, of the Kornberg near Bad Boll in the county of Göppingen in Baden-Württemberg.
The castle was probably built during the Celtic period as a refuge castle. The present burgstall only consists of two hollows between which the castle was probably located.
In the 12th century Berta von Boll, a sister of King Conrad III, is supposed to have had her dower seat here.[1]