| name | image | style | date demolished | type | use | administrative division | continent | date completed | date Start construction | Website | Height (m) | city | Country | latitude (°) | longitude (°) | Original_owner/Owner/Protection | Map |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Johannietershuis |  | Rock Castle | Friesland | Europe | website | Sneek | Netherlands | 53.0323690000 | 5.6580170000 | Map | |||||||
| Sielhof |  | Rock Castle | Lower Saxony | Europe | website | Neuharlingersiel | Germany | 53.7000007629 | 7.6999998093 | Map | |||||||
| Ulferts Börg |  | Rock Castle | Lower Saxony | Europe | 1200 - 1300 | website | Upgant-Schott | Germany | 53.5166664124 | 7.2833333015 | Map |