OSM tag name=Bischofsturm matches Bischofsturm in these Wikidata fields:
| Castles in Hamburg | building=castle, historic=tower_house, building=ruins, historic=castle, place=locality, historic=archaeological_site, historic=ruins, tourism=attraction |
| Museums in Hamburg | building=museum, tourism=gallery, historic=museum, tourism=museum, tourism=attraction |
| Round towers | man_made=tower, man_made=water_tower, building=tower |