{"nrhp_refnum":"71000646","name":"Piqua Historical Area State Memorial","other_names":["John Johnston Farm and Indian Agency"],"category":"building","location":{"address":"OH 66, 1 mi. N of Piqua","address_restricted":false,"city":"Piqua","county":"Miami County","state":"OH","lat":40.17944104700007,"lon":-84.25580948705257,"geom_source":"nps_gis"},"listed_date":"1971-04-07","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Prehistoric","Historic - Aboriginal","Military","Transportation","Architecture","Social History"],"significance_levels":["national"],"summary":{"what_it_is":"A state-owned historic farm and Indian Agency headquarters in Washington Township, about one mile north of Piqua, Miami County, Ohio. The brick house was begun in 1811 for John Johnston and sits beside a section of the Miami and Erie Canal.","why_significant":"John Johnston served as Indian Agent from this farm, and during the War of 1812 he supervised Indians who remained at peace with the U.S. The house is described as the only Indian Agency house in Ohio and one of the few left in the United States. The site also has a canal section tied to Johnston's promotion of the Miami and Erie Canal, and earlier layers of prehistoric, Miami Indian and frontier fort use.","narrative":"Along the Great Miami River north of Piqua, Ohio, this farm served as the home and Indian Agency headquarters of John Johnston. The brick house was finished in 1811, with a second section added in 1815. It has a gambrel roof, jack-arched windows and a stone foundation, and it resembles early Dutch houses of the Hudson River valley. A log barn from 1808, a brick springhouse and a restored stretch of the Miami and Erie Canal complete the grounds. Johnston came to Ohio in the 1790s, served as Indian Factor and then Indian Agent, and during the War of 1812 supervised Indians who stayed at peace with the United States, at times as many as 6,000 on his farm. He also served on the state canal board and promoted the Miami and Erie Canal. The house is described as the only Indian Agency house in Ohio. The site also holds traces of Hopewell earthworks, the Miami village of Pickawillany and Fort Piqua. Ohio acquired the farm in 1965 and restored the house to its 1830 appearance.","period_of_significance":null,"architect_builder":"John Keyt, builder or designer; McColough and Baker, bricklayers; Mr. Kigans, log barn","architectural_style":"Resembles early Dutch houses of the Hudson River valley; gambrel roof","criteria":[],"status_note":"Restored to its 1830 appearance and in excellent condition; opened to the public as a museum; the barn, fruit kiln, cider house and smoke house were still being restored or rebuilt, and the canal section was being restored.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:53:10.293613-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_OH/71000646.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/71000646/9827faf61d-800.webp","url_1600":"https://nationalhistoricalregister.com/media/71000646/9827faf61d-1600.webp","licence":"CC BY-SA 4.0","author":"Laura McKenzie Waters","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Panoramic_of_Johnston_Farm_and_Indian_Agency.jpg\" rel=\"noopener\">Laura McKenzie Waters</a>, <a href=\"https://creativecommons.org/licenses/by-sa/4.0\" rel=\"license noopener\">CC BY-SA 4.0</a>, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Panoramic_of_Johnston_Farm_and_Indian_Agency.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71990279","wikipedia":null,"wikidata":"https://www.wikidata.org/wiki/Q49543578"},"indexable":true,"url":"https://nationalhistoricalregister.com/ohio/miami-county/piqua-historical-area-state-memorial-71000646/"}