{"nrhp_refnum":"66000685","name":"Mount Pleasant","other_names":[],"category":"building","location":{"address":"Fairmount Park","address_restricted":false,"city":"Philadelphia","county":"Philadelphia","state":"PA","lat":39.983516264500054,"lon":-75.20052398156244,"geom_source":"nps_gis"},"listed_date":"1966-10-15","is_nhl":true,"nhl_designated_date":"1960-10-09","areas_of_significance":["Architecture"],"significance_levels":["national"],"summary":{"what_it_is":"Mount Pleasant is a two-and-a-half-story Georgian mansion on a hilltop on the east bank of the Schuylkill River in Fairmount Park, Philadelphia. It was built in 1761-62 by John MacPherson, a Scottish sea captain and privateer, and is now a house museum.","why_significant":"The nomination describes it as probably the only surviving example in the Middle Colonies of a symmetrical late Georgian composition of three units, and as one of the finest late Georgian interiors in American Georgian design. Its interiors, including carved woodwork, Palladian windows and the second-floor chambers, are cited as notable. The house is also linked to Benedict Arnold, who lived there in 1779-80, and to Baron von Steuben, who leased it briefly.","narrative":"Mount Pleasant is a hilltop mansion overlooking the Schuylkill River in Fairmount Park, Philadelphia, begun in late 1761 by John MacPherson, a Scottish sea captain who made a large fortune through privateering. Built of rubble masonry with stucco scored to imitate dressed stone, it has a hipped roof, a balustraded deck and two arched brick chimneys, with a central Palladian window and a Doric portico on its east and west facades. Its interior, especially the second-floor chambers with their scrolled ornament and arched cupboard doors, is regarded as one of the finest examples of late Georgian design in the American colonies. The house passed to General Benedict Arnold in 1779, and later to Baron von Steuben on a short lease. Acquired by the City of Philadelphia in 1868, it is now maintained as a house museum. The property is valued for its rare survival of a three-unit Georgian plan in the Middle Colonies and for its rich interior woodwork.","period_of_significance":"1761-1762","architect_builder":null,"architectural_style":"Late Georgian","criteria":["C"],"status_note":"Restored in 1925 and furnished as a house museum by the Philadelphia Museum of Art; the form states the property is in need of repair.","vacant_flag":false,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:29.566583-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/66000685_NHL.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/66000685/3f3f244c7a-800.webp","url_1600":"https://nationalhistoricalregister.com/media/66000685/3f3f244c7a-1600.webp","licence":"CC BY-SA 3.0","author":"ProfReader","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Mount_Pleasant,_Fairmount_Park,_wide_view_of_land_side.JPG\" rel=\"noopener\">ProfReader</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:Mount_Pleasant,_Fairmount_Park,_wide_view_of_land_side.JPG"},"district":{"nrhp_refnum":"72001151","name":"Fairmount Park","url":"https://nationalhistoricalregister.com/districts/pennsylvania/fairmount-park-72001151/"},"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71994265","wikipedia":"https://en.wikipedia.org/wiki/Mount_Pleasant_(mansion)","wikidata":"https://www.wikidata.org/wiki/Q6922887"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/philadelphia/mount-pleasant-66000685/"}