{"nrhp_refnum":"66000680","name":"Eastern State Penitentiary","other_names":[],"category":"building","location":{"address":"21st St. and Fairmount Ave.","address_restricted":false,"city":"Philadelphia","county":"Philadelphia","state":"PA","lat":39.968335459500054,"lon":-75.17266425572382,"geom_source":"nps_gis"},"listed_date":"1966-10-15","is_nhl":true,"nhl_designated_date":"1965-06-23","areas_of_significance":["Social History"],"significance_levels":["national"],"summary":{"what_it_is":"A former state penitentiary at 21st Street and Fairmount Avenue in Philadelphia, Pennsylvania, built beginning in 1823 on a site of a little over 10 acres. Its granite walls are 30 feet high and enclose a central administration building and radiating cell blocks.","why_significant":"The nomination argues the penitentiary is the prime example of the Pennsylvania system of imprisonment based on solitary confinement, a system that influenced prisons in Europe and South America. Its architect John Haviland's radial plan with individual cells, exercise yards and improved light and ventilation is described as far in advance of the typical prison of its time. The prison operated from 1829 until the system was abolished in 1913.","narrative":"Eastern State Penitentiary stands at 21st Street and Fairmount Avenue in Philadelphia, where construction began after the cornerstone was laid on May 22, 1823. John Haviland won a design competition for the prison, and his plan placed seven cell blocks around a central rotunda behind a 30-foot granite wall with towers. Each cell measured 12 by 8 feet and had its own exercise yard, and the design included improvements in light, heat and ventilation. The first prisoner was admitted on October 25, 1829. The penitentiary is significant as the main site of the Pennsylvania system of solitary confinement, which was widely studied and copied in Europe and South America. The system was abolished in 1913, and the prison was closed some fifty years later.","period_of_significance":"1829-1913","architect_builder":"John Haviland (architect)","architectural_style":null,"criteria":["A","C"],"status_note":"Closed after the system ended; the 7/69 form notes the prison is unchanged structurally from its last period of use in 1970, has been without heat for two years, and is abandoned.","vacant_flag":true,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:29.054703-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/66000680_NHL.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/66000680/fe1302993c-800.webp","url_1600":"https://nationalhistoricalregister.com/media/66000680/fe1302993c-1600.webp","licence":"Public domain","author":"Davidt8","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Eastern_state_penitentiary09.JPG\" rel=\"noopener\">Davidt8</a>, Public domain, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Eastern_state_penitentiary09.JPG"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71994379","wikipedia":"https://en.wikipedia.org/wiki/Eastern_State_Penitentiary","wikidata":"https://www.wikidata.org/wiki/Q489417"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/philadelphia/eastern-state-penitentiary-66000680/"}