{"nrhp_refnum":"98001075","name":"Flagg, Ethan, House-Blessed Sacrament Monastery","other_names":[],"category":"building","location":{"address":"23 Park Ave.","address_restricted":false,"city":"Yonkers","county":"Westchester County","state":"NY","lat":40.94051379100006,"lon":-73.89234865499998,"geom_source":"nps_gis"},"listed_date":"1998-08-12","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Architecture","Community Planning and Development"],"significance_levels":["local"],"summary":{"what_it_is":"A single complex building at 23 Park Avenue in Yonkers, Westchester County, New York, combining an 1850s Italianate villa built for Ethan Flagg, a 1922 monastery addition for the Sacramentine Nuns, and a 1954 connecting wing.","why_significant":"The form argues the building is an excellent example of the Italianate villas popular in Yonkers and the Lower Hudson Valley in the 1850s. It is also tied to Ethan Flagg, a leading citizen during Yonkers' growth from a small village into a major city. The 1922 monastery addition represents early 20th-century religious architecture in Westchester County.","narrative":"Set on a bluff above Palisade Avenue with views toward the Hudson River, this Yonkers building grew in three stages: an Italianate villa from the mid-1850s, a monastery addition of 1922, and a plain 1954 wing joining them. Ethan Flagg, who developed much of Yonkers from land inherited through his wife's family, had the villa built, and it appears on an 1858 atlas. It is brick with stone trim, a deep bracketed cornice, a pedimented porch and a square cupola. The Sacramentine Nuns bought it in 1915 and added a monastery faced in buff brick with Spanish tile roofs, an octagonal tower and a chapel with a saucer dome and a mural. Early features include a delivery system with rotating drums that kept nuns and the public apart. Listing recognized the villa as a fine example of its type, its link to Flagg, and the monastery as representative early twentieth-century religious architecture. Public spaces keep a high level of integrity, though many secondary rooms were altered for current uses.","period_of_significance":"c. 1855 - 1922","architect_builder":null,"architectural_style":"Mid-19th century Italian Villa; Late 19th and 20th century Revivals: Neo-Romanesque","criteria":["B","C"],"status_note":"Now used as a health clinic (Greyston Health Services) and residential units; the chapel is largely intact but its religious furnishings have been removed.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:51:50.077126-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_NY/98001075.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/98001075/44a136ebd3-800.webp","url_1600":"https://nationalhistoricalregister.com/media/98001075/44a136ebd3-1600.webp","licence":"CC BY-SA 3.0","author":"ALT55 - Victor M","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Yonkers_-_2013_058_-_Ethan_Flagg_House-Blessed_Sacrament_Monastery,_23_Park_Ave..JPG\" rel=\"noopener\">ALT55 - Victor M</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:Yonkers_-_2013_058_-_Ethan_Flagg_House-Blessed_Sacrament_Monastery,_23_Park_Ave..JPG"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/75323027","wikipedia":"https://en.wikipedia.org/wiki/Ethan_Flagg_House-Blessed_Sacrament_Monastery","wikidata":"https://www.wikidata.org/wiki/Q5402928"},"indexable":true,"url":"https://nationalhistoricalregister.com/new-york/westchester-county/flagg-ethan-house-blessed-sacrament-monastery-98001075/"}