{"nrhp_refnum":"73000697","name":"Marquette Building","other_names":[],"category":"building","location":{"address":"140 S. Dearborn St.","address_restricted":false,"city":"Chicago","county":"Cook County","state":"IL","lat":41.880022610000026,"lon":-87.62963570699998,"geom_source":"nps_gis"},"listed_date":"1973-08-17","is_nhl":true,"nhl_designated_date":"1976-01-07","areas_of_significance":["Architecture"],"significance_levels":["national"],"summary":{"what_it_is":"A steel-frame commercial office building at 140 South Dearborn Street in Chicago, Cook County, Illinois, completed in 1895 and designed by Holabird and Roche. A 26' x 100' addition was made to its west side in 1905.","why_significant":"The nomination argues the building is significant for its ties to the Chicago School of Architecture and as an example of the work of Holabird and Roche. It also cites the building's contribution to the aesthetic and functional development of modern architecture. Its facade directly expresses the steel skeleton, and its E-shaped floor plan with a light court is called a model of functional office design.","narrative":"Rising along Dearborn Street in Chicago, this office building from 1895 was designed by Holabird and Roche. Its brown masonry and terra cotta facade follows a base, shaft and capital arrangement, while broad Chicago-style windows fill each bay and show the steel frame behind them. The floor plan is shaped like a letter E around a light court of white enameled brick, so every office faces either the street or the court and receives natural light. The lobby features marble staircases and a mezzanine balcony wrapped in Tiffany mosaic panels that portray the exploration of the Northwest. Bronze panels above the entrance depict Marquette and Joliet. A 1905 addition matched the original materials closely, but the cornice was replaced by an extra floor around 1950. The building was listed because it exemplifies the Chicago School, represents the work of Holabird and Roche, and set influential principles for planning multi-storied office buildings.","period_of_significance":"1895","architect_builder":"Holabird and Roche","architectural_style":"Chicago School","criteria":[],"status_note":"Condition listed as good and altered, occupied. The cornice was removed around 1950 and replaced with a 17th floor, and the lobby and entrance have been modified, though the general proportions and monumentality remain.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:55:35.567849-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/opastorage/live/14/8922/28892214/content/electronic-records/rg-079/NPS_IL/73000697.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/73000697/31f4ef1ff9-800.webp","url_1600":"https://nationalhistoricalregister.com/media/73000697/31f4ef1ff9-1600.webp","licence":"CC BY 2.0","author":"Jaysin Trevino from Evanston, IL, US","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Marquette_Building_1_(14805228527).jpg\" rel=\"noopener\">Jaysin Trevino from Evanston, IL, US</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:Marquette_Building_1_(14805228527).jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/28892214","wikipedia":"https://en.wikipedia.org/wiki/Marquette_Building_(Chicago)","wikidata":"https://www.wikidata.org/wiki/Q6772574"},"indexable":true,"url":"https://nationalhistoricalregister.com/illinois/cook-county/marquette-building-73000697/"}