{"nrhp_refnum":"96000709","name":"Nissly Swiss Chocolate Company","other_names":[],"category":"building","location":{"address":"951 Wood St.","address_restricted":false,"city":"Mount Joy","county":"Lancaster County","state":"PA","lat":40.11348427100006,"lon":-76.52698811899995,"geom_source":"nps_gis"},"listed_date":"1996-06-28","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Architecture","Industry"],"significance_levels":["local"],"summary":{"what_it_is":"A three-story reinforced concrete factory building with a boiler room building and a loading dock, located along the Conrail railroad line in the Florin section of Mount Joy Borough, Lancaster County, Pennsylvania. It was constructed in 1920 for the Nissly Swiss Chocolate Company.","why_significant":"The nomination argues the factory is significant for its association with the early twentieth-century chocolate manufacturing industry in Lancaster County, which grew after the turn of the century. It also argues the building is significant for its early industrial design, with an exposed reinforced concrete skeleton and expansive windows, and that it is one of the best preserved examples of this construction applied to the chocolate industry in the county.","narrative":"Built in 1920 in the Florin section of Mount Joy Borough, the Nissly Swiss Chocolate Company factory is a three-story reinforced concrete building with a full raised basement, measuring roughly sixty by one hundred feet. Its exposed concrete skeleton, brick apron walls and large metal industrial windows gave the open manufacturing floors natural light and ventilation, and the concrete frame carried the weight and vibration of candy-making machinery. The company was chartered in May 1920 by the sons of tobacco dealer Eli Lindemuth Nissly, and it produced milk chocolate until bankruptcy during the Great Depression. The building's significance lies in its link to Lancaster County's chocolate industry, which drew on local dairy production and grew after the turn of the century, and in its design. The nomination regards it as one of the best preserved examples of this type of construction applied to chocolate manufacturing in the county.","period_of_significance":"ca. 1920-1929","architect_builder":null,"architectural_style":"No Style","criteria":["A","C"],"status_note":"The first floor is used for refurbishing wooden pallets and the remainder of the complex is vacant.","vacant_flag":true,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:37.118909-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/96000709.pdf"},"photo":null,"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71996634","wikipedia":"https://en.wikipedia.org/wiki/Nissly_Swiss_Chocolate_Company","wikidata":"https://www.wikidata.org/wiki/Q7041134"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/lancaster-county/nissly-swiss-chocolate-company-96000709/"}