{"nrhp_refnum":"10000148","name":"The Triangle Diner","other_names":["DHR File No. 138-5004"],"category":"building","location":{"address":"27 W. Gerrard St.","address_restricted":false,"city":"Winchester","county":"Winchester","state":"VA","lat":39.17866739800007,"lon":-78.16959686299998,"geom_source":"nps_gis"},"listed_date":"2010-03-31","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Architecture"],"significance_levels":["state"],"summary":{"what_it_is":"A one-story prefabricated stainless-steel diner at 27 West Gerrard Street in Winchester, Virginia, manufactured in 1948 by Jerry O'Mahony, Inc. of Elizabeth, New Jersey. It sits on a 0.21-acre lot with a rear addition and a neon freestanding sign.","why_significant":"The nomination argues the diner is a well-preserved example of the Moderne/Stainless Steel Period of diner design (1945-1960) and meets Criterion C at the statewide level. It is the older of only two stainless-steel O'Mahony diners known in Virginia and one of few remaining on its original site. Fewer than ten prefabricated diners are said to survive in the state.","narrative":"This one-story diner at 27 West Gerrard Street in Winchester, Virginia, was manufactured in 1948 by Jerry O'Mahony, Inc. of Elizabeth, New Jersey, and shipped to the city by train. Its stainless-steel walls, light blue porcelain tile, curved corner windows, terrazzo floor, full-length counter and sunray-patterned back bar remain largely intact. Around 1960 the building was moved about 50 feet back on its lot, and a rear kitchen and restroom addition, wood siding over the upper half, a shed roof and a basement were added. The nomination says the owners planned to remove the siding and roof to restore the original look; the property was listed as vacant while work was in progress. It is significant as one of very few surviving prefabricated Moderne-period diners in Virginia and the older of two stainless-steel O'Mahony diners in the state. It also remains on its original site, and a neon sign with a clock stands in front.","period_of_significance":"1948","architect_builder":"Jerry O'Mahony, Inc (Architect and manufacturer)","architectural_style":"MODERN MOVEMENT/Moderne Diner","criteria":["C"],"status_note":"Listed function is vacant/not in use (work in progress); the owners planned to remove the T-111 siding and shed roof in a 2009-10 restoration.","vacant_flag":true,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:52:03.316745-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/opastorage/live/62/6789/41678962/content/electronic-records/rg-079/NPS_VA/10000148.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/10000148/c4f3099c56-800.webp","url_1600":"https://nationalhistoricalregister.com/media/10000148/c4f3099c56-1600.webp","licence":"CC0","author":"Joel Bradshaw","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Triangle_Diner,_Winchester,_Virginia.JPG\" rel=\"noopener\">Joel Bradshaw</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:Triangle_Diner,_Winchester,_Virginia.JPG"},"district":{"nrhp_refnum":"80004318","name":"Winchester Historic District","url":"https://nationalhistoricalregister.com/districts/virginia/winchester-historic-district-80004318/"},"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/41678962","wikipedia":"https://en.wikipedia.org/wiki/Triangle_Diner","wikidata":"https://www.wikidata.org/wiki/Q7840059"},"indexable":true,"url":"https://nationalhistoricalregister.com/virginia/winchester/the-triangle-diner-10000148/"}