OSM tag name=Millett Opera House matches Millett Opera House in these Wikidata fields:
| Music venues completed in 1878 | amenity=concert_hall, amenity=nightclub, amenity=pub, amenity=restaurant, amenity=music_venue |
| National Register of Historic Places in Austin, Texas | boundary=protected_area, historic |
| Opera houses in Texas | amenity=pub, amenity=concert_hall, amenity=nightclub, historic=manor, amenity=restaurant, building=country_house, amenity=music_venue |
| Opera houses on the National Register of Historic Places in Texas | boundary=protected_area, building=country_house, amenity=music_venue, historic, historic=manor, amenity=restaurant, amenity=pub, amenity=nightclub, amenity=concert_hall |