{"nrhp_refnum":"100005233","name":"Tiedemann House","other_names":[],"category":"building","location":{"address":"212 West Washington St.","address_restricted":false,"city":"O'Fallon","county":"St. Clair County","state":"IL","lat":38.59361100000007,"lon":-89.91305599999998,"geom_source":"nps_gis"},"listed_date":"2020-05-29","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Architecture"],"significance_levels":["local"],"summary":null,"photo":{"url_800":"https://nationalhistoricalregister.com/media/100005233/658c06cb29-800.webp","url_1600":"https://nationalhistoricalregister.com/media/100005233/658c06cb29-1600.webp","licence":"CC BY-SA 4.0","author":"ErnstTiedemann","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:The_Tiedemann_house_at_212_W._Washington_in_O%27Fallon,_Illinois.jpg\" rel=\"noopener\">ErnstTiedemann</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:The_Tiedemann_house_at_212_W._Washington_in_O%27Fallon,_Illinois.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":null,"wikipedia":"https://en.wikipedia.org/wiki/Tiedemann_House","wikidata":"https://www.wikidata.org/wiki/Q102613816"},"indexable":true,"url":"https://nationalhistoricalregister.com/illinois/st-clair-county/tiedemann-house-100005233/"}