lat: 51.42076360000015, lon: 7.30145760000011
| Key | Value |
| alt_name | Burg Hardenstein |
| castle_type | defensive |
| contact:facebook | https://www.facebook.com/Hardenstein |
| contact:foursquare | 4d6132f11939a35de0842aee |
| contact:phone | +49 2302 73809 |
| contact:tripadvisor | 8861427 |
| contact:website | https://www.burgfreunde-hardenstein.de/ |
| contact:yelp | burgruine-hardenstein-witten |
| heritage | 8 |
| heritage:operator | UntereDenkmalbehörde |
| historic | castle |
| name:en | Hardenstein Castle |
| name:eo | Kastelo Hardenstein |
| operator | Friedrich Oberste-Frielinghaus |
| operator:type | private |
| ref:ebidat | 2462 |
| ref:gnd | 4530655-2 |
| ref:viaf | 246279779 |
| ref:witten | 5 |
| ruins | yes |
| start_date | ~1354 |
| wikidata | Q1012201 |
| wikimedia_commons | Category:Burg Hardenstein |
| wikipedia | de:Burg Hardenstein |