{"nrhp_refnum":"76001280","name":"Gildersleeve, Andrew, Octagonal Building","other_names":["Mattituck"],"category":"building","location":{"address":"Main Rd. and Love Lane","address_restricted":false,"city":"Mattituck","county":"Suffolk County","state":"NY","lat":40.991278814000054,"lon":-72.52303175899993,"geom_source":"nps_gis"},"listed_date":"1976-08-19","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Architecture"],"significance_levels":["local"],"summary":{"what_it_is":"A two-story octagonal frame building with attached store wing at the corner of Main Road and Love Lane in the center of Mattituck, Suffolk County, New York. Andrew Gildersleeve built it in 1854 as a combined dwelling and store.","why_significant":"The nomination calls it the least altered of the few octagonal structures surviving on Long Island and a close example of Orson Squire Fowler's octagon design ideas. Its original interior plan remains largely intact. It is also a rare octagon combining home and commercial uses, and it served as store, post office, boarding house and residence in Mattituck's economic and social life.","narrative":"Standing at the corner of Main Road and Love Lane in the center of Mattituck on Long Island's north fork, this two-story octagonal frame building was erected in 1854 by Andrew Gildersleeve, a carpenter, lumber dealer and farmer. It combined a family dwelling with an attached store wing. The design follows the ideas of Orson Squire Fowler, who promoted the octagon as the most functional building form. A central elliptical staircase rises to a cupola, and rooms are arranged around it. Over the years the building served as a general store, post office, boarding house and residence, and later owners added wings in 1891 and 1910. It is described as the least altered octagonal structure surviving on Long Island, with its original interior layout, plaster walls, simple moldings and mantels still present on the second story. After standing unused from 1937 until the early 1970s, it was partly occupied by commercial tenants when nominated.","period_of_significance":"1854","architect_builder":"Andrew Gildersleeve (1815-1893)","architectural_style":"Octagon Mode, patterned on the designs of Orson Squire Fowler","criteria":[],"status_note":"Unoccupied from 1937 until the early 1970s and affected by neglect. At the time of nomination the west wing housed a liquor store, the first story of the octagon was unoccupied after a brief use as a professional office, and renovation was being considered.","vacant_flag":null,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:50:39.82959-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_NY/76001280.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/76001280/4aebd39685-800.webp","url_1600":"https://nationalhistoricalregister.com/media/76001280/4aebd39685-1600.webp","licence":"CC BY-SA 3.0","author":"Americasroof","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Gildersleeve-octagon.jpg\" rel=\"noopener\">Americasroof</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:Gildersleeve-octagon.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/75322126","wikipedia":"https://en.wikipedia.org/wiki/Andrew_Gildersleeve_Octagonal_Building","wikidata":"https://www.wikidata.org/wiki/Q4757088"},"indexable":true,"url":"https://nationalhistoricalregister.com/new-york/suffolk-county/gildersleeve-andrew-octagonal-building-76001280/"}