{"nrhp_refnum":"03000043","name":"East Ohio Gas Company Building","other_names":["The NBC Building","The Rockwell Building"],"category":"building","location":{"address":"1403 E. Sixth St.","address_restricted":false,"city":"Cleveland","county":"Cuyahoga County","state":"OH","lat":41.502418575000036,"lon":-81.69118347599994,"geom_source":"nps_gis"},"listed_date":"2003-02-20","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Commerce","Architecture"],"significance_levels":["local"],"summary":{"what_it_is":"A six-story steel-frame office building at 1403 East Sixth Street in Cleveland, Cuyahoga County, Ohio, built in 1915 as headquarters of the East Ohio Gas Company. It faces the east border of the Cleveland Mall.","why_significant":"The nomination cites its role as headquarters of the East Ohio Gas Company and as the earliest private-sector response to the 1903 Group Plan, setting a precedent for later buildings along the Mall. It was also the first to use first-class fireproof construction under Cleveland's then-new building code. It is the only known Cleveland building by New York architect William Bunker Tubby, and it is a good example of Beaux Arts design.","narrative":"Built in 1915 at 1403 East Sixth Street in Cleveland, this six-story building served as headquarters of the East Ohio Gas Company. Designed by New York architect William Bunker Tubby, it is a steel-frame structure clad in Bedford limestone on three sides and red brick at the rear. Its tall first story features colossal Doric pilasters, and a stepped entablature over the entrance carries a wreathed clock flanked by stone eagles. Upper office floors wrap a U-shaped light court. The building was the earliest private-sector response to the 1903 Group Plan, setting a pattern for later construction along the east edge of the Cleveland Mall. It was also the first Cleveland building to use first-class fireproof construction under the city's new building code, and it is the only known Cleveland work by Tubby. Later use by NBC from 1967 to 2001 added studios and partitions, but the exterior remains in good condition and the original structure is intact.","period_of_significance":"1915 - 1952","architect_builder":"Tubby, William Bunker, Architect","architectural_style":"Late 19th and 20th Century Revivals: Beaux Arts Classicism","criteria":["A","C"],"status_note":"Exterior in good condition and retains original features; interior retains its original structural configuration but has been altered by renovations and NBC-era television offices. Current function listed as multiple dwelling (work in progress).","vacant_flag":null,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:52:07.249653-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_OH/03000043.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/03000043/63c5be29ea-800.webp","url_1600":"https://nationalhistoricalregister.com/media/03000043/63c5be29ea-1600.webp","licence":"CC BY 2.0","author":"Ohio Office of Redevelopment","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Calfee_Building.jpg\" rel=\"noopener\">Ohio Office of Redevelopment</a>, <a href=\"https://creativecommons.org/licenses/by/2.0\" rel=\"license noopener\">CC BY 2.0</a>, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Calfee_Building.jpg"},"district":{"nrhp_refnum":"02000702","name":"Euclid Avenue Historic District","url":"https://nationalhistoricalregister.com/districts/ohio/euclid-avenue-historic-district-02000702/"},"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71987812","wikipedia":null,"wikidata":"https://www.wikidata.org/wiki/Q137647762"},"indexable":true,"url":"https://nationalhistoricalregister.com/ohio/cuyahoga-county/east-ohio-gas-company-building-03000043/"}