{"nrhp_refnum":"06000821","name":"Burden, James A. Jr., House and Kahn, Otto H., House","other_names":["Convent of the Sacred Heart School"],"category":"building","location":{"address":"70 and 1 E. 91st St.","address_restricted":false,"city":"New York","county":"Manhattan","state":"NY","lat":40.78479241000008,"lon":-73.95752826899997,"geom_source":"nps_gis"},"listed_date":"2006-09-12","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Architecture","Social History","Commerce"],"significance_levels":["local"],"summary":{"what_it_is":"Two adjoining Gilded Age mansions at 7 and 1 East 91st Street in the Carnegie Hill neighborhood of Manhattan: the Beaux Arts Burden House (built 1902-1905) and the Italian Renaissance style Kahn House (built 1913-1918), now the Convent of the Sacred Heart School.","why_significant":"The nomination marks Architecture and Social History as areas of significance under Criteria A and C. It describes the Burden House as one of the finest French Beaux-Arts townhouses in New York City and the Kahn House as one of the finest Italian Renaissance style mansions in the city. Both buildings retain much of their original exterior and interior detailing despite conversion to a school.","narrative":"Two former Fifth Avenue-area mansions at 7 and 1 East 91st Street in Manhattan's Carnegie Hill now serve as a private girls' school. The Burden House, built between 1902 and 1905 to designs by Warren & Wetmore, is a French Beaux-Arts townhouse with a rusticated limestone base, a grand ballroom with projecting balconies, and a distinctive elliptical stair. The Kahn House, built 1913-1918 and designed by British architect J. Armstrong Stenhouse with C.P.H. Gilbert, is a limestone palazzo modeled on the Palazzo Cancelleria in Rome, with a private drive court and inner courtyard. The school acquired both in 1934 and joined them with a modern glass link in 1940-41. Much original decoration survives, including gilded ballrooms, tapestries and carved limestone. The pair was recognized for architectural quality, with the Burden House and Kahn House each described as among the finest of their types in New York City, and for their place in the area's social history.","period_of_significance":"1902-05 (Burden House); 1913-1934 (Kahn House)","architect_builder":"Warren & Wetmore (Burden House); J. Armstrong Stenhouse with associate architect C.P.H. Gilbert (Kahn House)","architectural_style":"Late 19th & 20th Century Revivals/Beaux Arts and Italian Renaissance","criteria":["A","C"],"status_note":"Both houses were converted to a private girls' school, the Convent of the Sacred Heart, in 1934 and remain in school use, joined internally by a 1940-41 link; recent renovations and a rear addition to the Kahn House were completed.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:51:52.631738-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_NY/06000821.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/06000821/5926c17484-800.webp","url_1600":"https://nationalhistoricalregister.com/media/06000821/5926c17484-1600.webp","licence":"CC BY-SA 3.0","author":"Americasroof","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Burden-7e91.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:Burden-7e91.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/75319340","wikipedia":null,"wikidata":"https://www.wikidata.org/wiki/Q122020437"},"indexable":true,"url":"https://nationalhistoricalregister.com/new-york/manhattan/burden-james-a-jr-house-and-kahn-otto-h-house-06000821/"}