{"nrhp_refnum":"74000762","name":"Ryan Round Barn","other_names":[],"category":"building","location":{"address":"6 mi. N of Kewanee","address_restricted":false,"city":"Kewanee","county":"Henry County","state":"IL","lat":41.32411445900004,"lon":-89.89501824199994,"geom_source":"nps_gis"},"listed_date":"1974-12-31","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Agriculture","Architecture"],"significance_levels":["state"],"summary":{"what_it_is":"A large round frame barn in the southwest part of Johnson-Sauk Trail State Park, about 6 miles north of Kewanee in Annawan Township, Henry County, Illinois. It dates to 1910 and is on a one-acre nominated site.","why_significant":"The nomination calls it the largest and best example of the round barn type known in Illinois. It is seen as an instructive example of an unusual structure and of efficient agricultural building, with technological as well as agricultural interest. Its good state of repair gives it an advantage over other round barns in the state.","narrative":"Set on the side of a rolling gully in Johnson-Sauk Trail State Park, about six miles north of Kewanee, this round barn dates to 1910. It is a frame structure roughly 61 feet high to the top of its cupola and 74 feet in diameter, with an 11-foot central silo. A reinforced concrete wall eight feet high forms its base. Above that, vertical fir studs carry horizontal siding that was apparently soaked and bent to follow the curve. The roof is built of hoop-like wooden strips and rests on the silo as its main support. Four gambrel dormers and double-hung windows light the three and a half levels inside. The nomination identifies it as the largest and best example of a round barn known in Illinois. Because the type is uncommon, and because this barn is in such good repair, it was judged worthy of special recognition for both its agricultural and technological interest.","period_of_significance":"20th Century (1910)","architect_builder":null,"architectural_style":"Round barn","criteria":[],"status_note":"Condition listed as good; altered; on original site. Owned by the State of Illinois and under consideration for use as a park office and/or museum.","vacant_flag":null,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:55:35.509956-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/opastorage/live/72/8929/28892972/content/electronic-records/rg-079/NPS_IL/74000762.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/74000762/1fcc26e459-800.webp","url_1600":"https://nationalhistoricalregister.com/media/74000762/1fcc26e459-1600.webp","licence":"CC BY-SA 3.0","author":"Ibzumin","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Kewanee,_Illinois_-_Ryan_Round_Barn_at_Johnson_Sauk_Trail_State_Recreation_Area.JPG\" rel=\"noopener\">Ibzumin</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:Kewanee,_Illinois_-_Ryan_Round_Barn_at_Johnson_Sauk_Trail_State_Recreation_Area.JPG"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/28892972","wikipedia":"https://en.wikipedia.org/wiki/Ryan_Round_Barn","wikidata":"https://www.wikidata.org/wiki/Q7384476"},"indexable":true,"url":"https://nationalhistoricalregister.com/illinois/henry-county/ryan-round-barn-74000762/"}