{"nrhp_refnum":"89002010","name":"Rock Ledge","other_names":[],"category":"district","location":{"address":"Roughly Ackert Hook Rd., Haggerty Hill Rd., and Troy Dr.","address_restricted":false,"city":"Rhinebeck","county":"Dutchess County","state":"NY","lat":41.899386833500046,"lon":-73.89938393601011,"geom_source":"nps_gis"},"listed_date":"1989-11-28","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Architecture"],"significance_levels":["local"],"summary":{"what_it_is":"Rock Ledge is a ca. 1904-1906 country estate district on Ackert Hook Road in the southwest part of Rhinebeck, Dutchess County, New York. It has an Italian Renaissance-style stone manor house and stone outbuildings on about 401 acres.","why_significant":"The nomination argues the estate is architecturally significant as a distinctive example of early twentieth-century country estate architecture in Rhinebeck. Its formal, classical manor house contrasts with the more picturesque estates of the period. The surviving stone dependencies and much of the original acreage show how Hudson Valley country seats were developed. The stonework continues Rhinebeck's tradition of masonry construction.","narrative":"Rock Ledge is a country estate in southwest Rhinebeck, built around 1904 to 1906 for Mr. and Mrs. William Starr Miller. New York City architects Frank Hoppin and Whitney Warren designed it. The centerpiece is a three-story rusticated stone manor house in the Italian Renaissance manner, with a ceramic tile hipped roof, quoins, arched openings and iron-railed balconies. Around it stand a stone carriage house, a stone barn, a guest cottage, two round pump houses, and, about half a mile away, a stone stable with its own pump house, cistern and slab bridge. Together, nine dependencies and support structures contribute to the estate, which now covers about 401 acres of a once larger 500-acre tract. The estate was listed for its architecture. Its formal, classical design is unusual in a rural setting and sets it apart from other early twentieth-century Rhinebeck estates. Its finely crafted stone outbuildings also continue the local masonry tradition. Later uses included a novitiate, a school and a treatment center, which altered the interiors.","period_of_significance":"ca. 1904-1906","architect_builder":"Frank Hoppin and Whitney Warren (architects, for Mr. and Mrs. William Starr Miller)","architectural_style":"Italian Renaissance","criteria":[],"status_note":"Buildings have been adapted for institutional use, including a residential treatment center in the manor house, carriage house, barn and cottage. The stone stable and its pump house are fire-damaged and deteriorated.","vacant_flag":null,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:50:44.787061-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_NY/89002010.pdf"},"photo":null,"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/75312526","wikipedia":"https://en.wikipedia.org/wiki/Rock_Ledge_(Rhinebeck,_New_York)","wikidata":"https://www.wikidata.org/wiki/Q7354550"},"indexable":true,"url":"https://nationalhistoricalregister.com/new-york/dutchess-county/rock-ledge-89002010/"}