{"nrhp_refnum":"78001190","name":"Chautauqua Auditorium","other_names":["Shelbyville Auditorium"],"category":"building","location":{"address":"Forest Park and NE 9th St.","address_restricted":false,"city":"Shelbyville","county":"Shelby County","state":"IL","lat":39.41818215500007,"lon":-88.79016566799999,"geom_source":"nps_gis"},"listed_date":"1978-01-30","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Entertainment/Recreation","Architecture"],"significance_levels":["state"],"summary":{"what_it_is":"A twenty-sided, 150-foot-diameter auditorium in Forest Park, a city park in Shelbyville, Shelby County, Illinois, built in 1903 by H.B. Trout. It is owned by the City of Shelbyville.","why_significant":"The nomination argues the building's chief significance lies in its unusual method of suspending the roof in 1903, using bridge-construction principles to create a clear span of 150 feet. It is also one of the few remaining reminders of the once-popular Chautauqua movement, for which few communities built permanent assembly halls.","narrative":"Chautauqua Auditorium, in Shelbyville's Forest Park, is a twenty-sided hall 150 feet across, built in 1903 by H.B. Trout, who ran a machine shop and bridge company in town. Inside, there are no supporting pillars; the roof is held by triangulated trusses radiating from a central post, with steel rods in tension and posts in compression. Trout applied bridge-building knowledge to this circular design, which the nomination describes as architecturally unique for its year. Sliding doors and dormer windows open for ventilation in summer, and the stage and proscenium arch with statues remain. The hall seats 5,000 and hosted speakers such as William Jennings Bryan, Billy Sunday, Carrie Nation and former President William H. Taft. It served the Shelbyville Chautauqua, held from 1900 to 1930 by the Shelby County Fair Association. Earlier programs took place on a platform at the racetrack grandstand, with visitors staying in tents and later cottages. The building is described as unaltered.","period_of_significance":"1903","architect_builder":"H.B. Trout","architectural_style":null,"criteria":[],"status_note":"Described as unaltered and the same as when built; occupied and in use as an auditorium, owned by the City of Shelbyville.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:55:35.15516-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/opastorage/live/15/8941/28894115/content/electronic-records/rg-079/NPS_IL/78001190.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/78001190/36735a8b37-800.webp","url_1600":"https://nationalhistoricalregister.com/media/78001190/36735a8b37-1600.webp","licence":"Public domain","author":"Nyttend","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Shelbyville_Chautauqua_Auditorium.jpg\" rel=\"noopener\">Nyttend</a>, Public domain, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Shelbyville_Chautauqua_Auditorium.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/28894115","wikipedia":"https://en.wikipedia.org/wiki/Chautauqua_Auditorium_(Shelbyville,_Illinois)","wikidata":"https://www.wikidata.org/wiki/Q5088380"},"indexable":true,"url":"https://nationalhistoricalregister.com/illinois/shelby-county/chautauqua-auditorium-78001190/"}