{"nrhp_refnum":"76002011","name":"Underwood, Ammon, House","other_names":[],"category":"building","location":{"address":"Main St.","address_restricted":false,"city":"East Columbia","county":"Brazoria County","state":"TX","lat":29.139131314000053,"lon":-95.61767579799994,"geom_source":"nps_gis"},"listed_date":"1976-06-24","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Commerce","Agriculture","Politics/Government","Architecture"],"significance_levels":["state"],"summary":{"what_it_is":"A two-story frame Greek Revival dwelling in East Columbia, Brazoria County, Texas, built in 1835 by Thomas W. Nibbs and later enlarged and occupied by Ammon Underwood. It now operates as a museum.","why_significant":"The house is tied to Texas pioneer and legislator Ammon Underwood, who lived there for about 50 years, and is one of the oldest houses in Brazoria County. A reviewer also describes it as a significant early example of Anglo pioneer architecture in Texas and one of few buildings remaining from Austin's first settlement.","narrative":"Built in 1835 by Alabama lawyer Thomas W. Nibbs, this East Columbia house began as a two-room frame dwelling. Ammon Underwood, a Massachusetts native who reached Texas in 1834, bought it with Catherine Carson and turned it into a two-story boarding house. After he married her daughter Rachel in 1839 it became the family home, and he lived there until his death in 1887. Underwood ran a mercantile business, served as postmaster, operated cotton plantations, and was elected to the 19th Texas Legislature. The house is a modest vernacular version of Greek Revival, with a center passage, wood siding, a side-gabled roof and a two-tiered porch. Erosion of the Brazos River bank forced the house to be moved several times on its lot, including in the 1860s and 1937. The First Capitol Historical Foundation acquired it in 1968 and opened it as a museum of early Texas life. In 2005 a relocation a few lots north, away from the river, was proposed.","period_of_significance":null,"architect_builder":"Thomas W. Nibbs (original builder, 1835)","architectural_style":"Vernacular interpretation of Greek Revival","criteria":[],"status_note":"Operated as a museum by the First Capitol Historical Foundation. In 2005 a move was proposed to a nearby site because Brazos River erosion threatened the house.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:54:19.607947-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/opastorage/live/54/9713/40971354/content/electronic-records/rg-079/NPS_TX/76002011.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/76002011/6d08b3d43c-800.webp","url_1600":"https://nationalhistoricalregister.com/media/76002011/6d08b3d43c-1600.webp","licence":"CC BY-SA 4.0","author":"Renelibrary","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:AmmonUnderwoodHouse2_(1_of_1).jpg\" rel=\"noopener\">Renelibrary</a>, <a href=\"https://creativecommons.org/licenses/by-sa/4.0\" rel=\"license noopener\">CC BY-SA 4.0</a>, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:AmmonUnderwoodHouse2_(1_of_1).jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/40971354","wikipedia":"https://en.wikipedia.org/wiki/Ammon_Underwood_House","wikidata":"https://www.wikidata.org/wiki/Q38251942"},"indexable":true,"url":"https://nationalhistoricalregister.com/texas/brazoria-county/underwood-ammon-house-76002011/"}