Riversdale Mansion
E919192
Riversdale Mansion is a historic Federal-style plantation house in Riverdale Park, Maryland, noted for its early 19th-century architecture and role in the region’s social and agricultural history.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Riversdale Mansion canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T11324004 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Riversdale Mansion Context triple: [Riverdale Park Historic District, hasLandmark, Riversdale Mansion]
-
A.
Litchfield Villa
Litchfield Villa is a historic 19th-century Italianate mansion in Brooklyn, New York, best known as the former residence of the Litchfield family and now a landmark building within Prospect Park.
-
B.
Blake House
Blake House is a historic residence and notable landmark located in the City of Fairfax, Virginia.
-
C.
Morven Park Mansion
Morven Park Mansion is a historic estate house in Leesburg, Virginia, best known as the former residence of Virginia Governor Westmoreland Davis and a prominent example of 19th-century architecture and preservation.
-
D.
Ellwood Manor
Ellwood Manor is a historic plantation house in Virginia that served as a significant Civil War headquarters and is now preserved within Fredericksburg and Spotsylvania National Military Park.
-
E.
Rosalie Mansion
Rosalie Mansion is a historic antebellum house and museum in Natchez, Mississippi, noted for its well-preserved architecture and role in Civil War history.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Riversdale Mansion Target entity description: Riversdale Mansion is a historic Federal-style plantation house in Riverdale Park, Maryland, noted for its early 19th-century architecture and role in the region’s social and agricultural history.
-
A.
Litchfield Villa
Litchfield Villa is a historic 19th-century Italianate mansion in Brooklyn, New York, best known as the former residence of the Litchfield family and now a landmark building within Prospect Park.
-
B.
Blake House
Blake House is a historic residence and notable landmark located in the City of Fairfax, Virginia.
-
C.
Morven Park Mansion
Morven Park Mansion is a historic estate house in Leesburg, Virginia, best known as the former residence of Virginia Governor Westmoreland Davis and a prominent example of 19th-century architecture and preservation.
-
D.
Ellwood Manor
Ellwood Manor is a historic plantation house in Virginia that served as a significant Civil War headquarters and is now preserved within Fredericksburg and Spotsylvania National Military Park.
-
E.
Rosalie Mansion
Rosalie Mansion is a historic antebellum house and museum in Natchez, Mississippi, noted for its well-preserved architecture and role in Civil War history.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
National Historic Landmark
ⓘ
building ⓘ historic house ⓘ museum ⓘ plantation house ⓘ |
| architecturalStyle | Federal style ⓘ |
| architecturalType | plantation house ⓘ |
| associatedFamily |
Calvert family of Maryland
ⓘ
linked to:
Calvert family
|
| associatedWith | Barons of Baltimore ⓘ |
| builtFor | Henri Joseph Stier family ⓘ |
| completionDate | 1807 ⓘ |
| constructionStartDate | 1801 ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| currentUse |
event venue
ⓘ
house museum ⓘ |
| dateAddedToNRHP | 1969-09-03 ⓘ |
| dateDesignatedNationalHistoricLandmark | 1997-12-08 ⓘ |
| hasBasement | yes ⓘ |
| hasCollection | Rosalie Stier Calvert letters ⓘ |
| hasFeature |
Palladian window
ⓘ
central block with flanking wings ⓘ interior decorative plasterwork ⓘ |
| hasGrounds |
historic gardens
ⓘ
reconstructed outbuildings ⓘ |
| hasHistoricalRole |
center of a large 19th-century plantation
ⓘ
social center for local gentry ⓘ |
| heritageDesignation |
National Historic Landmark of the United States
ⓘ
linked to:
National Historic Landmark
U.S. National Register of Historic Places listing ⓘ
linked to:
National Register of Historic Places
|
| locatedIn |
Maryland
ⓘ
Prince George's County, Maryland ⓘ
linked to:
Prince George’s County, Maryland
Riverdale Park, Maryland ⓘ United States ⓘ
linked to:
United States of America
|
| material | brick ⓘ |
| NRHPReferenceNumber | 69000310 ⓘ |
| NRHPType | building ⓘ |
| numberOfStoreys | 2 ⓘ |
| offers |
educational programs
ⓘ
guided tours ⓘ |
| openToPublic | yes ⓘ |
| operatedBy | Maryland-National Capital Park and Planning Commission ⓘ |
| originalOwner |
Henri Joseph Stier
ⓘ
Marie Louise Peeters Stier ⓘ |
| partOf | Washington metropolitan area ⓘ |
| roofType | hipped roof ⓘ |
| significantResident |
George Calvert
ⓘ
linked to:
George Calvert, 1st Baron Baltimore
Rosalie Stier Calvert ⓘ |
| usedFor |
mixed farming
ⓘ
plantation agriculture ⓘ tobacco cultivation ⓘ wheat cultivation ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Riversdale Mansion Description of subject: Riversdale Mansion is a historic Federal-style plantation house in Riverdale Park, Maryland, noted for its early 19th-century architecture and role in the region’s social and agricultural history.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.