{"nrhp_refnum":"78001177","name":"Waterloo Historic District","other_names":[],"category":"district","location":{"address":"517 S. Main St.","address_restricted":false,"city":"Waterloo","county":"Monroe County","state":"IL","lat":38.335184446000056,"lon":-90.1521832005653,"geom_source":"nps_gis"},"listed_date":"1978-12-01","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Architecture"],"significance_levels":["state"],"summary":{"what_it_is":"A historic district covering most of the central part of Waterloo, the Monroe County seat in Illinois. It centers on the courthouse square and Main Street and holds 271 structures, mostly 19th-century commercial and residential buildings.","why_significant":"The nomination argues the district is one of the most intact, if somewhat atypical, examples of a small 19th-century Illinois county seat. Its significance rests on the courthouse square, the nearly unbroken commercial front on Main Street, and the many small \"German Street House\" cottages that reflect German immigration. It also notes Waterloo's founders were prominent in early Illinois statehood.","narrative":"Waterloo's historic district takes in most of the central part of the Monroe County seat, south of St. Louis, Illinois. It contains 271 structures arranged around a courthouse square, where commercial activity concentrated along the west side of Main Street while the other sides developed as housing. Sixteen buildings form a continuous wall on that side of Main, and only two date from the 20th century. Architecturally the district mixes long-lived Federal elements with Greek Revival, Italianate and Second Empire touches. Its most distinctive feature is the \"German Street House,\" a small, usually brick cottage type built from before 1852 to at least 1901. These cottages recall the German immigrants who drove the town's growth after about 1840. The town was laid out in 1818 by George Forquer and Daniel Pope Cook and became the county seat in 1825. The nomination warns that aluminum siding, poor remodeling and suburban pressure from St. Louis threaten its integrity.","period_of_significance":"1800-1899","architect_builder":null,"architectural_style":"Federal, Greek Revival, Italianate and Second Empire elements, with the local \"German Street House\" cottage type","criteria":[],"status_note":"Condition marked good. The area is mostly occupied and in use as commercial, governmental and residential space. About 40% of older background buildings have been resided, and 5.5% of structures are intrusive.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:55:35.950646-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/opastorage/live/41/8937/28893741/content/electronic-records/rg-079/NPS_IL/78001177.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/78001177/3fc859ffb0-800.webp","url_1600":"https://nationalhistoricalregister.com/media/78001177/3fc859ffb0-1600.webp","licence":"Public domain","author":"Nyttend","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Monroe_County_Courthouse,_Waterloo.jpg\" rel=\"noopener\">Nyttend</a>, Public domain, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Monroe_County_Courthouse,_Waterloo.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/28893741","wikipedia":"https://en.wikipedia.org/wiki/Waterloo_Historic_District_(Illinois)","wikidata":"https://www.wikidata.org/wiki/Q7974243"},"indexable":true,"url":"https://nationalhistoricalregister.com/illinois/monroe-county/waterloo-historic-district-78001177/"}