{"nrhp_refnum":"04001289","name":"Lansdale Silk Hosiery Company-Interstate Hosiery Mills, Inc.","other_names":[],"category":"building","location":{"address":"200 S. Line St.","address_restricted":false,"city":"Lansdale","county":"Montgomery County","state":"PA","lat":40.23935889000006,"lon":-75.28129194899998,"geom_source":"nps_gis"},"listed_date":"2004-12-03","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Industry"],"significance_levels":["local"],"summary":{"what_it_is":"A multi-building knitting and textile factory at 200 S. Line Street in Lansdale Borough, Montgomery County, Pennsylvania, built in phases from 1922 to 1961 with red brick walls and pilastered elevations. The complex consists of the original 1922 building with additions, the 1932 three-story building along S. Line Street, and later sections.","why_significant":"The nomination argues the factory is significant under Criterion A in the area of Industry for its association with silk hosiery manufacturing, a sub-sector of southeastern Pennsylvania's textile industry. It was built by Lansdale Silk Hosiery Company and later operated by Interstate Hosiery Mills, Inc., producing full-fashioned women's hosiery into the 1950s. The factory's sustained growth and fully integrated production method are presented as representative of the region's industry.","narrative":"Located on South Line Street in Lansdale Borough, this red brick factory complex was begun in 1922 by Lansdale Silk Hosiery Company to produce full-fashioned silk hosiery. The original building opened in November 1922 with seven full-fashioned legging machines and two footer machines, and the plant expanded through additions in 1926, 1928 and 1929. In 1929 it was acquired by Interstate Hosiery Mills, Inc. of New York, which erected a three-story brick manufacturing building fronting S. Line Street in 1932 and added dyeing and finishing operations. Production ceased around 1954, after which the plant was used for sweater manufacturing and later textile finishing. The buildings are significant for their association with Philadelphia-area hosiery manufacturing and the fully integrated production system used in Montgomery County. The complex is noted for its unified brick vocabulary and open, column-supported interiors.","period_of_significance":"1922-1954","architect_builder":null,"architectural_style":"Commercial Style","criteria":["A"],"status_note":"The entire plant is described as currently vacant, with rehabilitation in the planning stages.","vacant_flag":true,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:10:27.229062-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/04001289.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/04001289/f85c89d299-800.webp","url_1600":"https://nationalhistoricalregister.com/media/04001289/f85c89d299-1600.webp","licence":"CC0","author":"Smallbones","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Lansdale_Silkmill_Montco_PA.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:Lansdale_Silkmill_Montco_PA.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71996171","wikipedia":"https://en.wikipedia.org/wiki/Lansdale_Silk_Hosiery_Compy-Interstate_Hosiery_Mills,_Inc.","wikidata":"https://www.wikidata.org/wiki/Q6487341"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/montgomery-county/lansdale-silk-hosiery-company-interstate-hosiery-mills-inc-04001289/"}