{"nrhp_refnum":"06001218","name":"Altenheim","other_names":["1720 MacArthur Boulevard","01-0069"],"category":"building","location":{"address":"1720 MacArthur Blvd.","address_restricted":false,"city":"Oakland","county":"Alameda County","state":"CA","lat":37.800604935000024,"lon":-122.22165952299997,"geom_source":"nps_gis"},"listed_date":"2007-01-10","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Social History"],"significance_levels":["local"],"summary":{"what_it_is":"Altenheim is a complex of retirement-home buildings on a six-acre landscaped lot at 1720 MacArthur Boulevard in the Dimond district of Oakland, Alameda County, California. The main buildings date from 1908-09 and 1914-15, after an 1893 original burned in 1908.","why_significant":"The complex is a long-running home for the elderly, in use on the same parcel since 1893. The nomination compares it with other Oakland care institutions for the aged. Its Classical Revival dormitories, Craftsman-influenced Dining Hall and park-like grounds retain excellent integrity. The surviving fire-safety layout reflects the response to the 1908 fire.","narrative":"Altenheim is a retirement-home complex on a six-acre hilltop lot in Oakland's Dimond district, on the same parcel since 1893. The first building burned in 1908 and was rebuilt in 1908-09 to designs by San Francisco architect Oscar Haupt, with a further campaign in 1914-15. Its H-shaped plan links long dormitory wings through a central Administration building and a Solarium. Large sliding fire doors and the separation of the wings reflect concern about fire after the loss of the original structure. The dormitories are Classical Revival, with Doric columns and clapboard or brick walls, while the Dining Hall shows Craftsman and Arts and Crafts influence, with half-timbering and exposed trusses. A 1926 Excelsior building, a 1914 Boiler House and three entrance gates also contribute. Mature, informal gardens, shaped over time by residents, buffer the buildings from the surrounding neighborhood. The complex retains excellent integrity and was listed as an example of long-serving care for the elderly in Oakland.","period_of_significance":null,"architect_builder":"Oscar Haupt (San Francisco architect, 1908-09 and 1914-15 buildings); Robert Frost (builder, 1908-09); Albert A. Schroepfer (1938 Administration building addition)","architectural_style":"Colonial Revival/Classical Revival","criteria":[],"status_note":"Historic use was a sanitarium (health care); current functions are multiple dwelling, with rehabilitation work in progress.","vacant_flag":null,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:54:29.745554-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_CA/06001218.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/06001218/49b199931a-800.webp","url_1600":"https://nationalhistoricalregister.com/media/06001218/49b199931a-1600.webp","licence":"CC BY-SA 3.0","author":"Sanfranman59","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Altenheim_(Oakland,_CA).JPG\" rel=\"noopener\">Sanfranman59</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:Altenheim_(Oakland,_CA).JPG"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/123858141","wikipedia":"https://en.wikipedia.org/wiki/Altenheim_(Oakland,_California)","wikidata":"https://www.wikidata.org/wiki/Q123220828"},"indexable":true,"url":"https://nationalhistoricalregister.com/california/alameda-county/altenheim-06001218/"}