| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sielhof |  | Rock Castle | Lower Saxony | Europe | website | Neuharlingersiel | Germany | 53.7000007629 | 7.6999998093 | Map |