OSM tag name=Duburg matches Duburg in these Wikidata fields:
| Former castles in Denmark | building=castle, historic=tower_house, building=ruins, historic=castle, place=locality, historic=archaeological_site, historic=ruins, tourism=attraction |
| Former castles in Germany | building=castle, historic=tower_house, building=ruins, historic=castle, place=locality, historic=archaeological_site, historic=ruins, tourism=attraction |