{"nrhp_refnum":"100003320","name":"William Brown Company Hosiery Mill","other_names":[],"category":"building","location":{"address":"3400-3412 J St.","address_restricted":false,"city":"Philadelphia","county":"Philadelphia","state":"PA","lat":39.99948200000006,"lon":-75.10905158658171,"geom_source":"nps_gis"},"listed_date":"2019-01-17","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Industry"],"significance_levels":["local"],"summary":null,"photo":null,"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":null,"wikipedia":null,"wikidata":null},"indexable":false,"url":"https://nationalhistoricalregister.com/pennsylvania/philadelphia/william-brown-company-hosiery-mill-100003320/"}