{"nrhp_refnum":"75000674","name":"Weyerhaeuser House","other_names":["House on the Hill"],"category":"building","location":{"address":"3052 10th Ave.","address_restricted":false,"city":"Rock Island","county":"Rock Island County","state":"IL","lat":41.50131871000008,"lon":-90.55532325999997,"geom_source":"nps_gis"},"listed_date":"1975-09-11","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Industry","Art","Architecture","Social History"],"significance_levels":["state"],"summary":{"what_it_is":"A three-story painted brick mansion with a Mansard roof and tower at 3052 10th Avenue, Rock Island, Illinois, on a former small farm known as the Conet place. It began as a modest brick farmhouse and was enlarged repeatedly between 1877 and 1907.","why_significant":"It was the long-time home of lumber magnate Frederick E. Weyerhaeuser, co-founder of the Weyerhaeuser and Denkmann Lumber Company, which grew into the Weyerhaeuser Company. The nomination presents it as a well-preserved 19th-century mansion of a leading American industrialist. Its elaborate dining room, built with Old World craftsmanship, is described as unique.","narrative":"Known locally as the House on the Hill, this three-story painted brick mansion in Rock Island, Illinois, sits on a campus tract that was once a small farm. Frederick E. Weyerhaeuser, a German immigrant and lumber pioneer, bought the square two-story farmhouse in 1865. As his fortune grew, he had it rebuilt in stages, with major work in 1877, 1882-83 and 1888, and a complete renovation by his daughter and son-in-law in 1907. The result has a Mansard roof, a tower, a large oak-paneled entrance hall and a ballroom on the third floor. The dining room is the showpiece, with apple-blossom carvings, cherry panels, custom hardware and a stained glass window attributed to John La Farge. Much of that work was done by Old World craftsmen. The family gave the house and 26 acres to Augustana College in 1954, and it has been kept with its original furnishings.","period_of_significance":"c. 1865 and on (19th Century)","architect_builder":null,"architectural_style":"Second Empire","criteria":[],"status_note":"Listed in excellent condition and altered. Owned by a college, which maintains it with original furnishings and uses the first floor for receptions, dinners, conferences and other events. It is described as a house museum.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:55:35.763528-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/opastorage/live/79/8939/28893979/content/electronic-records/rg-079/NPS_IL/75000674.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/75000674/95603d1303-800.webp","url_1600":"https://nationalhistoricalregister.com/media/75000674/95603d1303-1600.webp","licence":"CC0","author":"Smallbones","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Weyerhaeuser_House_RI_IL.jpg\" rel=\"noopener\">Smallbones</a>, <a href=\"http://creativecommons.org/publicdomain/zero/1.0/deed.en\" rel=\"license noopener\">CC0</a>, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Weyerhaeuser_House_RI_IL.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/28893979","wikipedia":"https://en.wikipedia.org/wiki/Weyerhaeuser_House","wikidata":"https://www.wikidata.org/wiki/Q7990316"},"indexable":true,"url":"https://nationalhistoricalregister.com/illinois/rock-island-county/weyerhaeuser-house-75000674/"}