{"nrhp_refnum":"82003803","name":"Heller, William Jacob, House","other_names":[],"category":"building","location":{"address":"501 Mixsell St.","address_restricted":false,"city":"Easton","county":"Northampton County","state":"PA","lat":40.70412340200005,"lon":-75.20109125199997,"geom_source":"nps_gis"},"listed_date":"1982-04-20","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Economics","Architecture"],"significance_levels":["local"],"summary":{"what_it_is":"A three-story Art Nouveau residence with Spanish Colonial and Moorish-inspired detailing, built of concrete stucco walls under a widely projecting red tile roof, perched on a rock promontory above the Delaware River in Easton, Northampton County, Pennsylvania.","why_significant":"The nomination argues the house is a rare residential example of the Art Nouveau style in Pennsylvania, where the style was more often used for theatrical or commercial buildings. It cites its Moorish-inspired ornament, its status as the first concrete structure in the area, and its interior staircase as distinctive. It also links the house to William Jacob Heller, a prominent Easton businessman who ran the American Flag Manufacturing Company.","narrative":"Perched on a rock promontory above the Delaware River in Easton, Northampton County, this three-story concrete stucco residence has a widely projecting red tile roof and Art Nouveau detailing drawn from Spanish Colonial and Moorish sources. Its horseshoe arches, rounded dormers and octagonal garden room with a sun deck supported by eight Ionic columns give it a distinctive profile. Built for William Jacob Heller, who founded the American Flag Manufacturing Company in 1866, the house is regarded as the only Art Nouveau residence known in the area and a rare example of the style applied to a private home in Pennsylvania. The elaborate mahogany staircase, with its curving handrail and balusters, is singled out as the interior's most notable feature. Heller, a businessman active in Easton during the late nineteenth and early twentieth centuries, is linked to the house's bold design.","period_of_significance":"1900-","architect_builder":null,"architectural_style":"Art Nouveau","criteria":[],"status_note":null,"vacant_flag":null,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:34.231777-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/82003803.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/82003803/0339c72206-800.webp","url_1600":"https://nationalhistoricalregister.com/media/82003803/0339c72206-1600.webp","licence":"CC BY-SA 3.0","author":"Shuvaev","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:William_Jacob_Heller_House.JPG\" rel=\"noopener\">Shuvaev</a>, <a href=\"https://creativecommons.org/licenses/by-sa/3.0\" rel=\"license noopener\">CC BY-SA 3.0</a>, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:William_Jacob_Heller_House.JPG"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71995383","wikipedia":"https://en.wikipedia.org/wiki/William_Jacob_Heller_House","wikidata":"https://www.wikidata.org/wiki/Q8013411"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/northampton-county/heller-william-jacob-house-82003803/"}