{"nrhp_refnum":"76002002","name":"Thomson, Elihu, House","other_names":["Elihu Thomson Administration Building"],"category":"building","location":{"address":"33 Elmwood Ave.","address_restricted":false,"city":"Swampscott","county":"Essex County","state":"MA","lat":42.469540410578546,"lon":-70.91820176093563,"geom_source":"nps_gis"},"listed_date":"1976-01-07","is_nhl":true,"nhl_designated_date":"1976-01-07","areas_of_significance":["Science"],"significance_levels":["national"],"summary":null,"photo":{"url_800":"https://nationalhistoricalregister.com/media/76002002/4282608d12-800.webp","url_1600":"https://nationalhistoricalregister.com/media/76002002/4282608d12-1600.webp","licence":"CC BY-SA 3.0","author":"Daderot at English Wikipedia","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Elihu_Thomson_House_-_Swampscott,_MA.JPG\" rel=\"noopener\">Daderot at English Wikipedia</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:Elihu_Thomson_House_-_Swampscott,_MA.JPG"},"district":{"nrhp_refnum":"02000696","name":"Olmsted Subdivision Historic District","url":"https://nationalhistoricalregister.com/districts/massachusetts/olmsted-subdivision-historic-district-02000696/"},"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":null,"wikipedia":"https://en.wikipedia.org/wiki/Swampscott_Town_Hall","wikidata":"https://www.wikidata.org/wiki/Q5360863"},"indexable":true,"url":"https://nationalhistoricalregister.com/massachusetts/essex-county/thomson-elihu-house-76002002/"}