OSM tag name=Hamtoren matches Hamtoren in these Wikidata fields:
| Castles in Utrecht (province) | historic=tower_house, historic=ruins, historic=castle, building=ruins, historic=archaeological_site, place=locality, tourism=attraction, building=castle |
| Towers completed in the 13th century | man_made=tower, building=tower, man_made=water_tower |
| Towers in Utrecht (province) | man_made=tower, building=tower, man_made=water_tower |