{"nrhp_refnum":"76001230","name":"Rock Hall","other_names":[],"category":"building","location":{"address":"199 Broadway","address_restricted":false,"city":"Lawrence","county":"Nassau County","state":"NY","lat":40.609085367000034,"lon":-73.73420853799996,"geom_source":"nps_gis"},"listed_date":"1976-11-21","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Politics/Government","Architecture"],"significance_levels":["local"],"summary":{"what_it_is":"Rock Hall is a two and one-half-story Georgian frame mansion at 199 Broadway in Lawrence, Nassau County, New York, built about 1767 for Josiah Martin on a three-acre site overlooking Jamaica Bay.","why_significant":"The nomination calls it one of the finest surviving Georgian structures on Long Island, notable for its early use of Georgian motifs, its Chinese Chippendale roof balustrade and its interiors. It is also tied to the Martin family, prominent Loyalists, including the younger Josiah Martin, the last colonial governor of North Carolina.","narrative":"Rock Hall is a shingled frame mansion with a gambrel roof at 199 Broadway in Lawrence, New York, built about 1767 for Josiah Martin, a wealthy shipping merchant and Crown official. It sits on three acres overlooking Jamaica Bay, set back behind trees and a long drive. The house is described as one of the finest surviving Georgian buildings on Long Island, with a Chinese Chippendale roof balustrade, paneled rooms, original mantels and Delft-tiled fireplaces. Federal-style changes were made in the early nineteenth century, and the Hewlett family added an east wing in 1881. During the Revolutionary War the Martin family lived here; the younger Josiah Martin was the last colonial governor of North Carolina, and the house was a center of Loyalist activity. The Hewlett family's descendants gave it to the Town of Hempstead in 1948. The town restored it to its eighteenth-century appearance in the early 1950s, and it now operates as a house museum.","period_of_significance":null,"architect_builder":null,"architectural_style":"Georgian","criteria":[],"status_note":"Owned by the Town of Hempstead, restored in the early 1950s, and operated as a historic house museum; condition listed as excellent and occupied.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:50:38.884967-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_NY/76001230.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/76001230/11097c886f-800.webp","url_1600":"https://nationalhistoricalregister.com/media/76001230/11097c886f-1600.webp","licence":"CC BY-SA 4.0","author":"DanTD","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:RockHallMuseumLawrenceNY.jpg\" rel=\"noopener\">DanTD</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:RockHallMuseumLawrenceNY.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/75319183","wikipedia":"https://en.wikipedia.org/wiki/Rock_Hall_(Lawrence,_New_York)","wikidata":"https://www.wikidata.org/wiki/Q7354447"},"indexable":true,"url":"https://nationalhistoricalregister.com/new-york/nassau-county/rock-hall-76001230/"}