Old Post Office Pavilion
E61263
The Old Post Office Pavilion is a historic late-19th-century federal building and former post office in Washington, D.C., known for its Romanesque Revival architecture and prominent clock tower offering panoramic city views.
All labels observed (4)
| Label | Occurrences |
|---|---|
| Old Post Office Pavilion canonical | 8 |
| City Post Office Building | 1 |
| Old Post Office | 1 |
| Old Post Office and Clock Tower | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T488260 — 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: Old Post Office Pavilion Context triple: [Pennsylvania Avenue, hasLandmark, Old Post Office Pavilion]
-
A.
Adams Building
The Adams Building is one of the main Library of Congress buildings in Washington, D.C., housing extensive research collections and reading rooms.
-
B.
Mint Building
The Mint Building is a historic structure within Saint Petersburg's Peter and Paul Fortress that once housed one of the Russian Empire’s principal mints for coin production.
-
C.
Madison Building
The Madison Building is one of the main Library of Congress structures in Washington, D.C., housing extensive research collections, reading rooms, and administrative offices.
-
D.
Brooks Building
The Brooks Building is a key teaching and learning facility of Manchester Metropolitan University, known for housing education and health-related disciplines in modern, sustainable spaces.
-
E.
Old City Hall
Old City Hall is a historic courthouse and former city government building in Philadelphia that stands adjacent to Independence Hall within Independence National Historical Park.
- 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: Old Post Office Pavilion Target entity description: The Old Post Office Pavilion is a historic late-19th-century federal building and former post office in Washington, D.C., known for its Romanesque Revival architecture and prominent clock tower offering panoramic city views.
-
A.
Adams Building
The Adams Building is one of the main Library of Congress buildings in Washington, D.C., housing extensive research collections and reading rooms.
-
B.
Mint Building
The Mint Building is a historic structure within Saint Petersburg's Peter and Paul Fortress that once housed one of the Russian Empire’s principal mints for coin production.
-
C.
Madison Building
The Madison Building is one of the main Library of Congress structures in Washington, D.C., housing extensive research collections, reading rooms, and administrative offices.
-
D.
Brooks Building
The Brooks Building is a key teaching and learning facility of Manchester Metropolitan University, known for housing education and health-related disciplines in modern, sustainable spaces.
-
E.
Old City Hall
Old City Hall is a historic courthouse and former city government building in Philadelphia that stands adjacent to Independence Hall within Independence National Historical Park.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
federal building
ⓘ
former post office ⓘ historic building ⓘ tourist attraction ⓘ |
| architect |
Office of the Supervising Architect of the U.S. Treasury
ⓘ
Willoughby J. Edbrooke ⓘ |
| architecturalStyle | Romanesque Revival ⓘ |
| category |
Clock towers in Washington, D.C.
ⓘ
Federal Triangle ⓘ Post office buildings on the National Register of Historic Places in Washington, D.C. ⓘ Romanesque Revival architecture in Washington, D.C. ⓘ Skyscraper office buildings in Washington, D.C. ⓘ |
| completionDate | 1899 ⓘ |
| coordinateLocation | 38.895°N 77.026°W ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| formerFunction | main post office for Washington, D.C. ⓘ |
| formerName |
Old Post Office Pavilion
self-linksurface differs
ⓘ
surface form:
Old Post Office and Clock Tower
|
| hasPart | clock tower ⓘ |
| hasViewOf |
National Mall
ⓘ
Pennsylvania Avenue ⓘ Washington Monument ⓘ |
| height | approximately 315 feet ⓘ |
| heritageDesignation |
National Register of Historic Places
ⓘ
surface form:
National Register of Historic Places listing
contributing property to Federal Triangle historic district ⓘ contributing property to Pennsylvania Avenue National Historic Site ⓘ |
| inception | 1892 ⓘ |
| locatedInAdministrativeTerritorialEntity |
Downtown Washington, D.C.
ⓘ
Federal Triangle ⓘ |
| locatedOn | Pennsylvania Avenue ⓘ |
| location | Washington, D.C. ⓘ |
| maintainedBy |
U.S. General Services Administration
ⓘ
surface form:
General Services Administration
|
| notableFor |
panoramic city views
ⓘ
prominent clock tower ⓘ |
| NRHPListingDate | 1973 ⓘ |
| NRHPReferenceNumber | 73002124 ⓘ |
| numberOfFloors | 12 ⓘ |
| openingDate | 1899 ⓘ |
| ownedBy |
United States government
ⓘ
surface form:
United States federal government
|
| publicAccess | clock tower observation deck open to visitors ⓘ |
| significantEvent |
renovated and preserved as a mixed-use development
ⓘ
threatened with demolition in the 1970s ⓘ |
| startDate | 1892 ⓘ |
| streetAddress | 1100 Pennsylvania Avenue NW ⓘ |
| tenant |
Trump International Hotel Washington, D.C. (former Old Post Office)
ⓘ
surface form:
Trump International Hotel Washington, D.C. (2016–2022)
Waldorf Astoria Washington DC (from 2022) ⓘ |
| use |
Trump International Hotel Washington, D.C. (former Old Post Office)
ⓘ
surface form:
hotel (former Trump International Hotel Washington, D.C.)
office building ⓘ retail space ⓘ |
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: Old Post Office Pavilion Description of subject: The Old Post Office Pavilion is a historic late-19th-century federal building and former post office in Washington, D.C., known for its Romanesque Revival architecture and prominent clock tower offering panoramic city views.
Referenced by (11)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
City Post Office Building
Trump International Hotel Washington, D.C. (former Old Post Office)
→
formerName
→
Old Post Office Pavilion
ⓘ
subject surface form:
Trump International Hotel Washington, D.C.
this entity surface form:
Old Post Office
Trump International Hotel Washington, D.C. (former Old Post Office)
→
alsoKnownAs
→
Old Post Office Pavilion
ⓘ
subject surface form:
Old Post Office
this entity surface form:
Old Post Office and Clock Tower