{"nrhp_refnum":"79001597","name":"Adam-Derby House","other_names":[],"category":"building","location":{"address":"166 Lexington Ave.","address_restricted":false,"city":"Oyster Bay","county":"Nassau County","state":"NY","lat":40.86732699700005,"lon":-73.53420495356697,"geom_source":"nps_gis"},"listed_date":"1979-05-17","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Architecture"],"significance_levels":["local"],"summary":{"what_it_is":"A two-and-one-half to three story wood-frame Queen Anne style house on a wooded five-acre lot at 166 Lexington Avenue, Oyster Bay, Nassau County, New York, completed in 1878 for Mrs. S.S. Adam.","why_significant":"The nomination calls it an outstanding, largely intact example of American Queen Anne residential design by architects William A. Potter and Robert H. Robertson. It was later home to Ethel Roosevelt Derby, daughter of President Theodore Roosevelt, and is described as the least altered of the Roosevelt summer houses in Oyster Bay. It also reflects the informal summer house building of late nineteenth-century Long Island.","narrative":"Set on a wooded hillside of about five acres in Oyster Bay, this large asymmetrical house was completed in 1878 for Mrs. S.S. Adam. Architects William A. Potter and Robert H. Robertson designed it during their brief partnership. Its wood exterior combines paneling, clapboards and imbricated shingles, with half-timbered gables, verandahs, a porte-cochere and five corbelled brick chimneys. Inside, eleven fireplaces, carved door surrounds, parquet floors and an open staircase survive, along with original steam radiators and electrified gas fixtures. The house is regarded as an outstanding and largely unaltered example of American Queen Anne design. It later became the home of Ethel Roosevelt Derby, daughter of President Theodore Roosevelt, who lived there from 1914 until her death. The nomination describes it as the least altered of the Roosevelt summer houses in Oyster Bay and a reminder of the elegant informality of Long Island summer residences in the late nineteenth century.","period_of_significance":"1800-1899","architect_builder":"William Appleton Potter and Robert Henderson Robertson","architectural_style":"American Queen Anne (transitional Shingle Style)","criteria":[],"status_note":"Listed as unoccupied and vacant at the time of nomination; the form describes the house as largely intact and barely visible from the street.","vacant_flag":true,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:50:39.951874-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_NY/79001597.pdf"},"photo":null,"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/75319067","wikipedia":"https://en.wikipedia.org/wiki/Adam-Derby_House","wikidata":"https://www.wikidata.org/wiki/Q4678593"},"indexable":true,"url":"https://nationalhistoricalregister.com/new-york/nassau-county/adam-derby-house-79001597/"}