{"nrhp_refnum":"79000244","name":"Callahan House","other_names":["Jacob Helm House"],"category":"building","location":{"address":"U.S. 29","address_restricted":false,"city":"Milford","county":"Pike County","state":"PA","lat":41.31687038800004,"lon":-74.79996856699995,"geom_source":"nps_gis"},"listed_date":"1979-07-23","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Architecture","Social History"],"significance_levels":["local"],"summary":{"what_it_is":"A long, one-and-a-half story frame clapboard house built in two sections, located in Milford, Pike County, Pennsylvania, beside the Sawkill Creek near U.S. 209. The first section dates from the late 18th century and the rear addition was built probably no later than about 1820.","why_significant":"The nomination argues the house is one of the best preserved examples of the earliest type of frontier house on the Pennsylvania side of the Upper Delaware Valley, with a plain simplicity that contrasts with later farmhouses and Victorian homes in nearby Milford. Local tradition holds it was an inn and a station on the Underground Railroad, but the document states these claims are unproven and treats the house's significance as an unspectacular but historically important connection to the region's history.","narrative":"Built in two sections beside the Sawkill Creek in Milford, Pike County, Pennsylvania, the Callahan House is a long, one-and-a-half story frame clapboard dwelling. The front section dates from the late eighteenth century, and the rear addition was built probably no later than about 1820. Both parts have steep gable roofs and wide brick chimneys at each end, with chimney backs exposed at first-floor level, a regional Dutch building practice. Original features include slender porch posts, beaded ceiling boards, an eight-panel entrance door, end-fireplace mantels with simple geometric moldings, and original floorboards. The house is regarded as one of the best preserved examples of the earliest frontier house type on the Pennsylvania side of the Upper Delaware Valley. Its plain form contrasts with later farmhouses and Victorian homes in nearby Milford. Local tradition claims it served as an inn and an Underground Railroad station, though the evidence for these claims has not been established.","period_of_significance":null,"architect_builder":null,"architectural_style":null,"criteria":[],"status_note":"The house is in good condition, with a substantial amount of original interior detail remaining; its alignment is perpendicular to U.S. 209 and it sits about ten feet below the highway.","vacant_flag":null,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:29.937967-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/79000244.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/79000244/7c5fd435c3-800.webp","url_1600":"https://nationalhistoricalregister.com/media/79000244/7c5fd435c3-1600.webp","licence":"Public domain","author":"National Park Service","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Callahan_House_DWG_NPS.jpg\" rel=\"noopener\">National Park Service</a>, Public domain, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Callahan_House_DWG_NPS.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71996555","wikipedia":"https://en.wikipedia.org/wiki/Callahan_House_(Milford,_Pennsylvania)","wikidata":"https://www.wikidata.org/wiki/Q5021722"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/pike-county/callahan-house-79000244/"}