{"nrhp_refnum":"71000683","name":"Allegheny Post Office","other_names":["Old North Post Office","The Landmarks Museum"],"category":"building","location":{"address":"Allegheny Center","address_restricted":false,"city":"Pittsburgh","county":"Allegheny County","state":"PA","lat":40.45270737300007,"lon":-80.00692632599998,"geom_source":"nps_gis"},"listed_date":"1971-07-27","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Architecture"],"significance_levels":["national"],"summary":{"what_it_is":"A domed, roughly square granite post office building in Pittsburgh, Allegheny County, Pennsylvania, measuring 75 by 102 feet, with a circular dome 45 feet in diameter and 90 feet high. It was built by the Federal Government on a site purchased in February 1893.","why_significant":"The nomination argues the building is an extremely well designed example of a small late 19th-century public building, and that its domed mass contributes visual value in an urban area that has been extensively redeveloped. It is described as the only domed structure of its design in western Pennsylvania. Its restrained early Renaissance style is presented as a link to humanistic traditions.","narrative":"Built by the Federal Government on a site bought in February 1893, the Allegheny Post Office in Pittsburgh is a granite building of roughly square plan, 75 by 102 feet. Although it is practically one story high because of its central rotunda, it presents the outside appearance of a three-story building, and its circular dome rises 90 feet, with a diameter of 45 feet. Construction began in 1893, the building was finished late in 1897, and it was occupied early in 1898. Frank Rutan served as resident architect, while the design came from the office of the Architect to the U.S. Treasury. The style follows the early Italian Renaissance of the fifteenth and early sixteenth centuries, with an arcaded front, applied pilasters and a monumental scale. The nomination regards it as an well-proportioned small public building of the late nineteenth century, and as the only domed building of its design in western Pennsylvania. Its domed mass was valued as a visual feature in a redeveloped city district. It was being converted into a museum of county history.","period_of_significance":"1897","architect_builder":"Frank Rutan (resident architect); designed in the office of the Architect to the U.S. Treasury, under the supervision of Jeremiah Rourke and William M. Aiken","architectural_style":"Early Italian Renaissance (15th and early 16th centuries)","criteria":["C"],"status_note":"Being converted by the Pittsburgh History and Landmarks Foundation into a museum of Pittsburgh and Allegheny County history.","vacant_flag":false,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:30.949049-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/71000683.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/71000683/bb26544efc-800.webp","url_1600":"https://nationalhistoricalregister.com/media/71000683/bb26544efc-1600.webp","licence":"CC BY-SA 3.0","author":"Aij","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Allegheny_Post_Office_front.jpg\" rel=\"noopener\">Aij</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:Allegheny_Post_Office_front.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71997662","wikipedia":"https://en.wikipedia.org/wiki/Allegheny_Post_Office","wikidata":"https://www.wikidata.org/wiki/Q4731329"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/allegheny-county/allegheny-post-office-71000683/"}