OSM tag alt_name=Down matches Down Cathedral in these Wikidata fields:
| Anglican cathedrals in Northern Ireland | building=cathedral |
| Churches in County Down | amenity=place_of_worship, disused:amenity=place_of_worship, man_made=tower, building=church |
| Gothic Revival church buildings in Northern Ireland | amenity=place_of_worship, disused:amenity=place_of_worship, man_made=tower, building=church |
| Pre-Reformation Roman Catholic cathedrals | building=cathedral |