{"name":"Dumbarton House","city":"Washington, D.C., District of Columbia","canonical_url":"https://gydeinfo.com/washington-dc/places/dumbarton-house/","markdown_url":"https://gydeinfo.com/washington-dc/places/dumbarton-house.md","updated_at":"2026-06-20T06:38:39.033740+00:00","facts":[{"claim":"A National Endowment for the Humanities article describes Dumbarton House as one of the first grand residences in Georgetown and says it was built in 1799.","citation":"https://www.neh.gov/humanities/2016/januaryfebruary/curio/dumbarton-house-in-georgetown-obliged-washington-dc%E2%80%99s-expanding-street-grid-in-1915-moving","source_title":"Dumbarton House in Georgetown Obliged Washington, D.C's Expanding Street Grid in 1915 Moving","source_type":"official","allowed_use":"canonical_data","retrieved_at":"2026-06-20T06:19:26.034596+00:00","fact_type":"architecture","as_of":"2016","confidence":0.9},{"claim":"The house was formerly known as Bellevue and was first owned by Joseph Nourse.","citation":"https://www.neh.gov/humanities/2016/januaryfebruary/curio/dumbarton-house-in-georgetown-obliged-washington-dc%E2%80%99s-expanding-street-grid-in-1915-moving","source_title":"Dumbarton House in Georgetown Obliged Washington, D.C's Expanding Street Grid in 1915 Moving","source_type":"official","allowed_use":"canonical_data","retrieved_at":"2026-06-20T06:19:26.034596+00:00","fact_type":"anecdote","as_of":"2016","confidence":0.88},{"claim":"The house was built around 1800 and was once home to Charles Carroll.","citation":"https://www.nps.gov/thingstodo/dumbarton-house.htm","source_title":"Explore the Dumbarton House (U.S. National Park Service)","source_type":"official","allowed_use":"canonical_data","retrieved_at":"2026-06-20T06:19:25.219764+00:00","fact_type":"history","as_of":"2026","confidence":0.92},{"claim":"According to the National Park Service, Charles Carroll reportedly sheltered Dolley Madison there in 1814.","citation":"https://www.nps.gov/thingstodo/dumbarton-house.htm","source_title":"Explore the Dumbarton House (U.S. National Park Service)","source_type":"official","allowed_use":"canonical_data","retrieved_at":"2026-06-20T06:19:25.219764+00:00","fact_type":"anecdote","as_of":"1814","confidence":0.84},{"claim":"The museum displays 18th- and 19th-century artifacts and offers self-guided or interpretive tours.","citation":"https://www.nps.gov/thingstodo/dumbarton-house.htm","source_title":"Explore the Dumbarton House (U.S. National Park Service)","source_type":"official","allowed_use":"canonical_data","retrieved_at":"2026-06-20T06:19:25.219764+00:00","fact_type":"significance","as_of":"2026","confidence":0.9},{"claim":"Dumbarton House opened its principal floors to the public as a house museum in 1932.","citation":"https://en.wikipedia.org/wiki/Dumbarton_House","source_title":"Dumbarton House - Wikipedia","source_type":"manual","allowed_use":"facts_with_citation","retrieved_at":"2026-06-20T06:19:24.419730+00:00","fact_type":"history","as_of":"1932","confidence":0.93},{"claim":"The house was purchased by the NSCDA in 1928 and became its headquarters.","citation":"https://en.wikipedia.org/wiki/Dumbarton_House","source_title":"Dumbarton House - Wikipedia","source_type":"manual","allowed_use":"facts_with_citation","retrieved_at":"2026-06-20T06:19:24.419730+00:00","fact_type":"history","as_of":"1928","confidence":0.9},{"claim":"Dumbarton House is a Federal-period historic house museum on about an acre of gardens in Georgetown.","citation":"https://en.wikipedia.org/wiki/Dumbarton_House","source_title":"Dumbarton House - Wikipedia","source_type":"manual","allowed_use":"facts_with_citation","retrieved_at":"2026-06-20T06:19:24.419730+00:00","fact_type":"architecture","as_of":"2026","confidence":0.92},{"claim":"Dumbarton House accepts event inquiries and bookings.","citation":"https://dumbartonhouse.org/book/","source_title":"Book an Event - Dumbarton House","source_type":"official","allowed_use":"canonical_data","retrieved_at":"2026-06-20T06:19:23.643230+00:00","fact_type":"capacity","as_of":"2026","confidence":0.94},{"claim":"The site is used for weddings and other events.","citation":"https://dumbartonhouse.org/book/","source_title":"Book an Event - Dumbarton House","source_type":"official","allowed_use":"canonical_data","retrieved_at":"2026-06-20T06:19:23.643230+00:00","fact_type":"architecture","as_of":"2026","confidence":0.9},{"claim":"Dumbarton House presents itself as a mission-driven historic site focused on preservation, education, and cultural life in Washington, D.C.","citation":"https://dumbartonhouse.org/","source_title":"Dumbarton House - Washington, DC","source_type":"official","allowed_use":"canonical_data","retrieved_at":"2026-06-20T06:19:22.815514+00:00","fact_type":"significance","as_of":"2026","confidence":0.95},{"claim":"Dumbarton House is closed for the foreseeable future because of an HVAC overhaul.","citation":"https://dumbartonhouse.org/visit-dumbarton-house/","source_title":"Visit Dumbarton House","source_type":"official","allowed_use":"canonical_data","retrieved_at":"2026-06-20T06:19:22.012631+00:00","fact_type":"hours","as_of":"2026","confidence":0.99},{"claim":"Dumbarton House is fully ADA accessible.","citation":"https://dumbartonhouse.org/visit-dumbarton-house/","source_title":"Visit Dumbarton House","source_type":"official","allowed_use":"canonical_data","retrieved_at":"2026-06-20T06:19:22.012631+00:00","fact_type":"accessibility","as_of":"2026","confidence":0.98},{"claim":"Accessible parking is available in the lot off 27th Street, just north of Q Street.","citation":"https://dumbartonhouse.org/visit-dumbarton-house/","source_title":"Visit Dumbarton House","source_type":"official","allowed_use":"canonical_data","retrieved_at":"2026-06-20T06:19:22.012631+00:00","fact_type":"accessibility","as_of":"2026","confidence":0.96},{"claim":"Dumbarton House was built in 1799.","citation":"https://dumbartonhouse.org/about/","source_title":"About – Dumbarton House","source_type":"official","allowed_use":"canonical_data","retrieved_at":"2026-06-20T06:19:21.213467+00:00","fact_type":"history","as_of":"1799","confidence":0.98},{"claim":"The National Society of The Colonial Dames of America acquired Dumbarton House in 1928.","citation":"https://dumbartonhouse.org/about/","source_title":"About – Dumbarton House","source_type":"official","allowed_use":"canonical_data","retrieved_at":"2026-06-20T06:19:21.213467+00:00","fact_type":"history","as_of":"1928","confidence":0.95},{"claim":"The museum's mission is to promote historic preservation and early American history.","citation":"https://dumbartonhouse.org/about/","source_title":"About – Dumbarton House","source_type":"official","allowed_use":"canonical_data","retrieved_at":"2026-06-20T06:19:21.213467+00:00","fact_type":"significance","as_of":"2026","confidence":0.97}],"sources":[{"title":"Dumbarton House in Georgetown Obliged Washington, D.C's Expanding Street Grid in 1915 Moving","url":"https://www.neh.gov/humanities/2016/januaryfebruary/curio/dumbarton-house-in-georgetown-obliged-washington-dc%E2%80%99s-expanding-street-grid-in-1915-moving","source_type":"official","allowed_use":"canonical_data","retrieved_at":"2026-06-20T06:19:26.034596+00:00","license":"unknown"},{"title":"Explore the Dumbarton House (U.S. National Park Service)","url":"https://www.nps.gov/thingstodo/dumbarton-house.htm","source_type":"official","allowed_use":"canonical_data","retrieved_at":"2026-06-20T06:19:25.219764+00:00","license":"unknown"},{"title":"Dumbarton House - Wikipedia","url":"https://en.wikipedia.org/wiki/Dumbarton_House","source_type":"manual","allowed_use":"facts_with_citation","retrieved_at":"2026-06-20T06:19:24.419730+00:00","license":"CC BY-SA 4.0"},{"title":"Book an Event - Dumbarton House","url":"https://dumbartonhouse.org/book/","source_type":"official","allowed_use":"canonical_data","retrieved_at":"2026-06-20T06:19:23.643230+00:00","license":"unknown"},{"title":"Dumbarton House - Washington, DC","url":"https://dumbartonhouse.org/","source_type":"official","allowed_use":"canonical_data","retrieved_at":"2026-06-20T06:19:22.815514+00:00","license":"unknown"},{"title":"Visit Dumbarton House","url":"https://dumbartonhouse.org/visit-dumbarton-house/","source_type":"official","allowed_use":"canonical_data","retrieved_at":"2026-06-20T06:19:22.012631+00:00","license":"unknown"},{"title":"About – Dumbarton House","url":"https://dumbartonhouse.org/about/","source_type":"official","allowed_use":"canonical_data","retrieved_at":"2026-06-20T06:19:21.213467+00:00","license":"unknown"}],"commercial_actions":[],"source_policy":{"booking_links_are_evidence":false,"denied_as_evidence":["google_places","google","yelp","tripadvisor"],"allowed_uses":["canonical_data","facts_with_citation","anecdote"]}}