{"nrhp_refnum":"78002449","name":"Insurance Company of North America Building","other_names":[],"category":"building","location":{"address":"1600 Arch St.","address_restricted":false,"city":"Philadelphia","county":"Philadelphia","state":"PA","lat":39.954563547500044,"lon":-75.1669993058735,"geom_source":"nps_gis"},"listed_date":"1978-06-02","is_nhl":true,"nhl_designated_date":"1978-06-16","areas_of_significance":["Commerce"],"significance_levels":["national"],"summary":{"what_it_is":"A 16-story steel-frame, brick-and-stone office building at 1600 Arch Street in Philadelphia, completed in 1925, designed by Stewardson & Page and built by Stone & Webster, Inc. It served as the home office of the Insurance Company of North America.","why_significant":"The building is the company's ninth home office, the only one of the nine still standing, and it was planned and completed during Benjamin Rush's presidency. The nomination links it to Rush's systematic classification of marine risks and to the company's leadership in marine and inland marine insurance. The building is described as virtually unaltered externally and as retaining many original interior features.","narrative":"Completed in 1925 at 1600 Arch Street in Philadelphia, the sixteen-story steel-frame office building was designed by Stewardson & Page and built by Stone & Webster, Inc. Its base is faced in Stonington pink granite, its shaft in red brick laid in Flemish bond, and its crown in white Indiana limestone. The 16th Street entrance has four granite Corinthian columns, each topped by a carved granite eagle, the company's symbol. The building was the Insurance Company of North America's ninth home office and is the only one of the nine still standing. It was planned during the presidency of Benjamin Rush, whose systematic classification of marine risks, introduced in the 1890s, is central to the company's rise in marine and inland marine insurance. The lobby retains Kasota marble walls, and the 12th-floor executive offices and 16th-floor auditorium keep original decor. The company's history dates to 1792.","period_of_significance":"1800-1899","architect_builder":"Stewardson & Page (architect); Stone & Webster, Inc. (builder)","architectural_style":"Second Renaissance and Georgian Revival","criteria":["A","C"],"status_note":"In excellent condition; continues to house the company's executive offices.","vacant_flag":false,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:30.606306-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/78002449_NHL.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/78002449/9085a940d0-800.webp","url_1600":"https://nationalhistoricalregister.com/media/78002449/9085a940d0-1600.webp","licence":"CC BY-SA 3.0","author":"See below","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:WTP_D09_AMP_2.jpg\" rel=\"noopener\">See below</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:WTP_D09_AMP_2.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71994331","wikipedia":"https://en.wikipedia.org/wiki/Insurance_Company_of_North_America_Building_(Philadelphia)","wikidata":"https://www.wikidata.org/wiki/Q6042311"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/philadelphia/insurance-company-of-north-america-building-78002449/"}