| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Blankenburg Castle (Harz) |  | Saxony-Anhalt | Europe | 1123 | website | Blankenburg (Harz) | Germany | 51.7833328247 | 10.9499998093 | Map | |||||||
| Regenstein Castle |  | Saxony-Anhalt | Europe | 12nd century | website | Blankenburg (Harz) | Germany | 51.7999992371 | 10.9499998093 | Map |