{"nrhp_refnum":"77001154","name":"Pennypacker, Matthias, Farm","other_names":["Tinker Dam Farm"],"category":"building","location":{"address":"S of Phoenixville on White Horse Rd.","address_restricted":false,"city":"Phoenixville","county":"Chester County","state":"PA","lat":40.11056102300006,"lon":-75.50712010199999,"geom_source":"nps_gis"},"listed_date":"1977-12-27","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Military","Architecture"],"significance_levels":["local"],"summary":{"what_it_is":"A Georgian-style farmhouse with a large stone bank barn, outbuildings and mill remains on Mill Road at the edge of Phoenixville, Chester County, Pennsylvania. The house is built in two sections forming an L, of rubble masonry with pebble-dash stucco and a slate roof.","why_significant":"The nomination argues the property is the surviving remnant of an outstanding mill-farm complex developed by the Pennypacker family from 1774. Its significance rests on its associations with the Valley Forge encampment in the winter of 1777-1778 and with the Pennypacker family, including Governor Samuel Pennypacker.","narrative":"A two-section stone farmhouse on Mill Road in Phoenixville, Chester County, built of rubble masonry with pebble-dash stucco and a slate roof. The older west section predates the Revolution, and a three-story main block with a datestone of 1830 was added later. The property includes a 1805 stone bank barn, a smoke house, spring house, and a dug well. It was the core of a mill-farm complex begun in 1774 by Matthias Pennypacker, a Mennonite bishop who sided with the Colonists. In the winter of 1777-1778, during the Valley Forge encampment, a company of horse was stationed at the house, the orchard served as a parade ground, and the barn held powder. The grist and saw mills on Pickering Creek were later demolished, the grist mill in 1929 when a water company dam flooded its site. The house passed out of the family in 1934.","period_of_significance":"Circa 1780's, Circa 1830","architect_builder":null,"architectural_style":"Georgian","criteria":[],"status_note":"The house passed out of the family in 1934; the saw mill was demolished in 1885 and the grist mill in 1929.","vacant_flag":null,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:29.236757-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/77001154.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/77001154/099bee6c33-800.webp","url_1600":"https://nationalhistoricalregister.com/media/77001154/099bee6c33-1600.webp","licence":"CC0","author":"Smallbones","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Pennypacker_Farm_Barn.JPG\" rel=\"noopener\">Smallbones</a>, <a href=\"http://creativecommons.org/publicdomain/zero/1.0/deed.en\" rel=\"license noopener\">CC0</a>, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Pennypacker_Farm_Barn.JPG"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71997596","wikipedia":"https://en.wikipedia.org/wiki/Matthias_Pennypacker_Farm","wikidata":"https://www.wikidata.org/wiki/Q6791591"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/chester-county/pennypacker-matthias-farm-77001154/"}