{"nrhp_refnum":"78002486","name":"St. Vincent Archabbey Gristmill","other_names":["The Gristmill"],"category":"building","location":{"address":"SW of Latrobe off U.S. 30","address_restricted":false,"city":"Latrobe","county":"Westmoreland County","state":"PA","lat":40.295398257000045,"lon":-79.40248674599997,"geom_source":"nps_gis"},"listed_date":"1978-01-18","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Engineering","Architecture","Religion","Agriculture"],"significance_levels":["local"],"summary":{"what_it_is":"A four-story mill building at the foot of the hill at Saint Vincent Archabbey in Latrobe, Westmoreland County, Pennsylvania, built in 1854 as a steam-powered gristmill.","why_significant":"The nomination argues the mill is significant for its agricultural and engineering role and its continuous operation for over a century, with its original stones, elevators and belt drives still in use. It also cites the monastic building tradition of the Benedictine community that constructed it and the mill's value for showing a nineteenth-century milling system in operation.","narrative":"Built in 1854 at the foot of the hill at Saint Vincent Archabbey in Latrobe, the gristmill was constructed by the Benedictine monks of Saint Vincent Monastery. It was designed as a steam mill of about 45 by 40 feet and four stories, with an 1855 addition and a further addition in 1883. Its frame is hand-hewn chestnut and its foundation is local sandstone. The mill has never been water-powered; steam was the original source, and electric motors replaced it in 1952. Three French flint millstones, each about three tons, remain in use alongside original bucket elevators, belt conveyors and sifting machines. Because it has operated continuously for well over a century and retains most of its original methods and equipment, it is regarded as a rare working example of a nineteenth-century gristmill. The mill also served as the economic and social center of the surrounding agricultural community, and its layout reflects the monastery's building traditions.","period_of_significance":"1850-1899","architect_builder":"Saint Vincent Monastery (Benedictine monks)","architectural_style":null,"criteria":["A","C"],"status_note":"In continued use and in good interior condition; the exterior siding is described as deteriorated.","vacant_flag":false,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:29.599585-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/78002486.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/78002486/b39db90321-800.webp","url_1600":"https://nationalhistoricalregister.com/media/78002486/b39db90321-1600.webp","licence":"CC BY-SA 3.0","author":"Canadian2006","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:St_Vincent_Archabbey_Gristmill.jpg\" rel=\"noopener\">Canadian2006</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:St_Vincent_Archabbey_Gristmill.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71996189","wikipedia":"https://en.wikipedia.org/wiki/Saint_Vincent_Archabbey_Gristmill","wikidata":"https://www.wikidata.org/wiki/Q7592077"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/westmoreland-county/st-vincent-archabbey-gristmill-78002486/"}