{"nrhp_refnum":"88000026","name":"US Mint","other_names":["San Francisco Assay Office"],"category":"building","location":{"address":"155 Hermann St.","address_restricted":false,"city":"San Francisco","county":"San Francisco","state":"CA","lat":37.770186618000025,"lon":-122.42713840799996,"geom_source":"nps_gis"},"listed_date":"1988-02-18","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Industry","Economics","Politics/Government"],"significance_levels":["national"],"summary":{"what_it_is":"The United States Mint at 155 Hermann Street, San Francisco, is a three-story granite-faced Classical Revival building on a small rock knoll, built 1935-1937 to replace the earlier Old Mint. It was designed by the Office of the Supervising Architect.","why_significant":"The nomination argues the building is the third home of the San Francisco Mint and played an ongoing, exceptionally significant role in U.S. economic history. It served as a depository and assay site for gold and silver, and as a coin production facility. Because of this continuing role, the period of significance was extended to within the last fifty years.","narrative":"Set on a small rock knoll at 155 Hermann Street, this three-story, granite-faced Classical Revival building houses the San Francisco Mint, also called the San Francisco Assay Office. Construction began in August 1935, the cornerstone was laid in July 1936, and it was dedicated in May 1937. The Clinton Construction Company built it from plans by the Office of the Supervising Architect. Inside, the lobby is finished in marble and bronze, with carved marble eagles, an inlaid compass, and a gold-leaf ceiling. A 1958 remodeling converted much of the interior for other agencies. It is the third building to house the Mint in San Francisco, a facility authorized by Congress in 1852. Coins were struck here from 1937 to 1955, and assay work continued afterward. Minting resumed in 1966, and the facility now makes proof sets and silver bullion coins. Its long economic role led to a period of significance running to the present.","period_of_significance":"1937-1987","architect_builder":"Gilbert Stanley Underwood (listed as Underwood, Gilbert Stanlay); built by Clinton Construction Co., California; plans prepared by the Office of Supervising Architect","architectural_style":"Classical Revival","criteria":["A"],"status_note":"Still in use as a U.S. Mint facility producing proof coin sets and American Eagle silver bullion coins; a high-security operating facility not open to the public.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:54:28.214296-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_CA/88000026.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/88000026/599a9ef022-800.webp","url_1600":"https://nationalhistoricalregister.com/media/88000026/599a9ef022-1600.webp","licence":"CC BY-SA 4.0","author":"Frevi","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:NRIS_88000026_Mint_Building_-_Duboce_St_Elevation.jpg\" rel=\"noopener\">Frevi</a>, <a href=\"https://creativecommons.org/licenses/by-sa/4.0\" rel=\"license noopener\">CC BY-SA 4.0</a>, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:NRIS_88000026_Mint_Building_-_Duboce_St_Elevation.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/123861347","wikipedia":"https://en.wikipedia.org/wiki/San_Francisco_Mint","wikidata":"https://www.wikidata.org/wiki/Q3109253"},"indexable":true,"url":"https://nationalhistoricalregister.com/california/san-francisco/us-mint-88000026/"}