{"nrhp_refnum":"04001298","name":"Oak Park Conservatory","other_names":[],"category":"building","location":{"address":"615 Garfield St.","address_restricted":false,"city":"Oak Park","county":"Cook County","state":"IL","lat":41.87166362100004,"lon":-87.78984961299994,"geom_source":"nps_gis"},"listed_date":"2005-03-08","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Architecture","Entertainment/Recreation"],"significance_levels":["local"],"summary":{"what_it_is":"A multiple-room glass greenhouse and public conservatory at 615 Garfield Street in Oak Park, Cook County, Illinois, built in 1929 by Foley Greenhouse Manufacturing Company of Forest Park.","why_significant":"The nomination argues it meets Criterion A as a milestone in Oak Park's park movement and Criterion C as a rare Illinois example of a glass-and-steel greenhouse reminiscent of Victorian glasshouses. It is one of the oldest and largest public conservatories in the Chicago region. Its integrity is good despite the 1972 aluminum reframing and a 2000 addition.","narrative":"Oak Park's public conservatory, at 615 Garfield Street, is a glass-and-steel greenhouse built in 1929 for $32,000 by Foley Greenhouse Manufacturing Company of Forest Park. It holds three display houses, for desert, tropical and fern plants, and two growing wings that supply bedding plants to village parks. A signature indoor waterfall in the tropic house dates to its opening. Its steel trusses, steep gabled roofs and bell-shaped entrance canopy recall Victorian glasshouse design. The building was listed for its role in the growth of Oak Park's park system, created by referendum in 1912, and for its architecture, as one of few such glasshouses in the Chicago area. Much of the wood glazing frame was replaced with aluminum in 1972, though the original wood awning windows remain on the north and east faces. A masonry education and community wing added in 2000 is a separate, non-contributing structure. Community members rallied to save the building from demolition in the late 1960s, and it remains in use.","period_of_significance":"1929-1954","architect_builder":"FOLEY GREENHOUSE MANUFACTURING COMPANY","architectural_style":"OTHER: EDWARDIAN SPACE FRAME GLASSHOUSE","criteria":["A","C"],"status_note":"In continuous use since 1929 as a public conservatory and growing facility for the Park District of Oak Park; integrity described as good.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:55:37.752601-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/opastorage/live/98/8923/28892398/content/electronic-records/rg-079/NPS_IL/04001298.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/04001298/2e69e8e885-800.webp","url_1600":"https://nationalhistoricalregister.com/media/04001298/2e69e8e885-1600.webp","licence":"CC BY 2.5","author":"IvoShandor","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Oak_Park_Il_Conservatory1.jpg\" rel=\"noopener\">IvoShandor</a>, <a href=\"https://creativecommons.org/licenses/by/2.5\" rel=\"license noopener\">CC BY 2.5</a>, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Oak_Park_Il_Conservatory1.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/28892398","wikipedia":"https://en.wikipedia.org/wiki/Oak_Park_Conservatory","wikidata":"https://www.wikidata.org/wiki/Q7073668"},"indexable":true,"url":"https://nationalhistoricalregister.com/illinois/cook-county/oak-park-conservatory-04001298/"}