{"nrhp_refnum":"66000234","name":"Ralston, William C., House","other_names":[],"category":"building","location":{"address":"College of Notre Dame campus","address_restricted":false,"city":"Belmont","county":"San Mateo County","state":"CA","lat":37.51765031800005,"lon":-122.28712294122275,"geom_source":"nps_gis"},"listed_date":"1966-11-15","is_nhl":true,"nhl_designated_date":"1966-11-15","areas_of_significance":["Commerce","Economics","Social History"],"significance_levels":["national"],"summary":{"what_it_is":"Ralston Hall (also called Berchman's Hall), a mansion on the College of Notre Dame campus in Belmont, San Mateo County, California. It was developed from 1864 by financier William Chapman Ralston around an 1850s villa built by Count Leonetto Cipriani.","why_significant":"The house was the country estate of William C. Ralston, the San Francisco financier who founded the Bank of California and built the Palace Hotel. He used the estate to entertain prominent visitors and promote California's potential. The form also notes its Italian villa style with riverboat-inspired interior features, and the surviving stone carriage house.","narrative":"Ralston Hall is a mansion on the grounds of the College of Notre Dame in Belmont, California. William Chapman Ralston, the San Francisco financier behind the Bank of California and the Palace Hotel, bought a modest villa built by Count Leonetto Cipriani in 1864 and enlarged it into a house of more than eighty rooms. The result is a modified Italian villa whose interior borrows from Mississippi riverboats, with sliding doors, curved walls, skylights, a mirrored ballroom and silver-plated hardware. Ralston entertained leading figures there, including Ulysses S. Grant and Leland Stanford, to showcase California's prospects. After his death in 1875, the estate passed to Senator William Sharon, then served as a girls' school and a private sanitarium. The Sisters of Notre Dame de Namur bought it in 1922 and restored it. A four-foot-thick stone carriage house from about 1874 also survives, the only remaining outbuilding from Ralston's time.","period_of_significance":"1864-1875","architect_builder":null,"architectural_style":"Modified Italian villa with \"steamboat Gothic\" interior features","criteria":[],"status_note":"Restored by the Sisters of Notre Dame and in use as part of the College of Notre Dame; the stone carriage house is also standing and in use.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:55:32.192467-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_CA/66000234_NHL.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/66000234/3232395bbc-800.webp","url_1600":"https://nationalhistoricalregister.com/media/66000234/3232395bbc-1600.webp","licence":"CC BY-SA 3.0","author":"Created by Kglavin","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Ralston_hall.JPG\" rel=\"noopener\">Created by Kglavin</a>, <a href=\"http://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:Ralston_hall.JPG"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/123858082","wikipedia":"https://en.wikipedia.org/wiki/Ralston_Hall","wikidata":"https://www.wikidata.org/wiki/Q7288363"},"indexable":true,"url":"https://nationalhistoricalregister.com/california/san-mateo-county/ralston-william-c-house-66000234/"}