{"nrhp_refnum":"00001418","name":"Oswego County Courthouse","other_names":[],"category":"building","location":{"address":"East Bridge St.","address_restricted":false,"city":"Oswego","county":"Oswego County","state":"NY","lat":43.457213885000044,"lon":-76.50565271099998,"geom_source":"nps_gis"},"listed_date":"2000-12-07","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Architecture"],"significance_levels":["local"],"summary":{"what_it_is":"A two-story limestone county courthouse on East Bridge Street in Oswego, New York, built in 1859-1860 to designs by Syracuse architect Horatio Nelson White. It sits on an elevated site at the south edge of Washington Square.","why_significant":"The courthouse is significant for its link to the development of county government in the nineteenth century and as an outstanding example of mid-nineteenth century Renaissance Revival public architecture. It reflects the prosperity Oswego gained from its canal and port. It is also considered one of Central New York's finest examples of historic civic architecture.","narrative":"Oswego County's courthouse occupies a hilltop site on the south edge of Washington Square on the city's east side. Built in 1859-1860 for about $29,390, it is a two-story building faced in Onondaga limestone, with a cruciform plan, a four-column Corinthian portico and a domed cupola ringed by cast iron columns. Horatio Nelson White of Syracuse designed it in the Renaissance Revival style, using rustication, pilasters and entablatures with dentils and modillions. Smaller cupolas top the side wings, which were raised from one story to two in 1891. A limestone addition was built at the rear in 1962 and is counted as non-contributing. Inside, twin winding staircases lead to a large second-floor courtroom. The building replaced an 1818 frame courthouse and reflects the prosperity that the Oswego Canal and the port brought to the county before the Civil War. It has remained in continuous use as a courthouse for 140 years.","period_of_significance":"1859-1891","architect_builder":"White, Horation Nelson, architect. Smith & Ratigan, masons; Williams & Atkinson, carpenters.","architectural_style":"Mid-19th Century; Other / Early Renaissance Revival","criteria":["C"],"status_note":"Still in use as a courthouse after 140 years; the basement has been rehabilitated for offices and conference space, and the building has been reroofed and redecorated.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:51:50.319581-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_NY/00001418.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/00001418/3e41a769a4-800.webp","url_1600":"https://nationalhistoricalregister.com/media/00001418/3e41a769a4-1600.webp","licence":"Public domain","author":"Calvin Beale","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Oswego_County_Courthouse,_(Built_1860),_Oswego,_New_York.jpg\" rel=\"noopener\">Calvin Beale</a>, Public domain, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Oswego_County_Courthouse,_(Built_1860),_Oswego,_New_York.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/75320857","wikipedia":"https://en.wikipedia.org/wiki/Oswego_County_Courthouse","wikidata":"https://www.wikidata.org/wiki/Q7108227"},"indexable":true,"url":"https://nationalhistoricalregister.com/new-york/oswego-county/oswego-county-courthouse-00001418/"}