{"nrhp_refnum":"100010575","name":"Keystone Mill","other_names":["2023re08290"],"category":"building","location":{"address":"201 Leverington Avenue","address_restricted":false,"city":"Philadelphia","county":"Philadelphia","state":"PA","lat":40.03095200000007,"lon":-75.22613199999995,"geom_source":"nps_gis"},"listed_date":"2024-07-26","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Industry","Architecture"],"significance_levels":["local"],"summary":null,"photo":null,"district":{"nrhp_refnum":"72001151","name":"Fairmount Park","url":"https://nationalhistoricalregister.com/districts/pennsylvania/fairmount-park-72001151/"},"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":null,"wikipedia":null,"wikidata":null},"indexable":false,"url":"https://nationalhistoricalregister.com/pennsylvania/philadelphia/keystone-mill-100010575/"}