{"nrhp_refnum":"79001603","name":"Flatiron Building","other_names":["Fuller Building"],"category":"building","location":{"address":"5th Ave. and Broadway St","address_restricted":false,"city":"New York","county":"Manhattan","state":"NY","lat":40.74112060400006,"lon":-73.98961310028704,"geom_source":"nps_gis"},"listed_date":"1979-11-20","is_nhl":true,"nhl_designated_date":"1989-06-29","areas_of_significance":["Architecture"],"significance_levels":["national"],"summary":{"what_it_is":"A twenty-one story steel-framed office tower on a triangular lot at Fifth Avenue, Broadway and 23rd Street on Madison Square in Manhattan, completed in 1902 to designs by D.H. Burnham & Co.","why_significant":"It is an important early example of a steel-framed skyscraper built on an unusual triangular site, with a prow-like northern end that gives an impression of slenderness and height. It is tied to Daniel Burnham, a Chicago architect who helped develop the skyscraper form. It captured public imagination and was widely depicted in art and souvenirs of the period.","narrative":"Rising twenty-one stories at the meeting of Fifth Avenue, Broadway and 23rd Street, this Manhattan office tower fills a triangular lot on the southwest corner of Madison Square. Completed in 1902 and originally called the Fuller Building after the Fuller Construction Company that financed and built it, it was designed by D.H. Burnham & Co. Its steel skeleton is sheathed in limestone, terra cotta and brick, and its facades follow a base, shaft and capital arrangement, with ornate oriel windows and a stone balustrade at the top. The narrow northern end, with rounded corners, gives the impression of a ship's prow. Daniel Burnham, who helped shape the modern skyscraper in Chicago, was its architect. Early critics nicknamed it \"Burnham's Folly,\" yet it became one of the most talked-about skyscrapers of its time and appeared in many paintings, postcards and souvenirs. The exterior remains largely original, while the interior has been fully modernized.","period_of_significance":"1900-","architect_builder":"D.H. Burnham & Co.","architectural_style":null,"criteria":[],"status_note":"Exterior in excellent condition and largely original; interior completely remodeled; occupied commercial office use with retail on lower floors.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:50:39.613336-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_NY/79001603.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/79001603/9a2d709fad-800.webp","url_1600":"https://nationalhistoricalregister.com/media/79001603/9a2d709fad-1600.webp","licence":"Public domain","author":"Imelenchon (original work)","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Edificio_Fuller_(Flatiron)_en_2010_desde_el_Empire_State_crop_boxin.jpg\" rel=\"noopener\">Imelenchon (original work)</a>, Public domain, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Edificio_Fuller_(Flatiron)_en_2010_desde_el_Empire_State_crop_boxin.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/75319505","wikipedia":"https://en.wikipedia.org/wiki/Flatiron_Building","wikidata":"https://www.wikidata.org/wiki/Q220728"},"indexable":true,"url":"https://nationalhistoricalregister.com/new-york/manhattan/flatiron-building-79001603/"}