| Altraderach Castle | |
|---|---|
Burg Altraderach, Weiherberg, Heidenschlösschen, Tannenburg | |
| Friedrichshafen-Kluftern-"Weiherberg" | |
 | |
  Altraderach Castle | |
| Coordinates | 47°41′30″N 9°26′00″E / 47.691769°N 9.433200°E |
| Type | lowland castle |
| Code | DE-BW |
| Height | 472.4 m above sea level (NN) |
| Site information | |
| Condition | lost or levelled |
| Site history | |
| Built | 12th century |
Altraderach Castle (German: Burg Altraderach), also called the Old Castle (Alte Burg) or Little Heathen Palace (Heidenschlösschen), is a levelled castle in the area between Unterraderach and Raderach. The still easily visible burgstall lies in the parish of Kluftern in the borough of Friedrichshafen in the county of Bodenseekreis in the German state of Baden-Württemberg.