Skenfrith Castle
E167395
Skenfrith Castle is a medieval riverside fortress in southeast Wales, notable as one of the “Three Castles” built to control the Monnow Valley near the English border.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Skenfrith Castle canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T1288667 — 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: Skenfrith Castle Context triple: [Monmouthshire, containsSite, Skenfrith Castle]
-
A.
Dolwyddelan Castle
Dolwyddelan Castle is a medieval Welsh fortress in Snowdonia, traditionally associated with the native prince Llywelyn the Great and commanding a strategic mountain pass.
-
B.
Kidwelly Castle
Kidwelly Castle is a well-preserved medieval fortress in southwest Wales, noted for its imposing stone walls and strategic riverside location.
-
C.
Neath Castle
Neath Castle is a medieval Norman fortress ruin located in the town of Neath in South Wales.
-
D.
Carreg Cennen Castle
Carreg Cennen Castle is a dramatic medieval hilltop fortress in southwest Wales, renowned for its striking clifftop setting and extensive ruins.
-
E.
Cyfarthfa Castle
Cyfarthfa Castle is a 19th-century mock-Gothic mansion in Merthyr Tydfil, Wales, historically linked to the iron industry and now serving as a museum and public 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: Skenfrith Castle Target entity description: Skenfrith Castle is a medieval riverside fortress in southeast Wales, notable as one of the “Three Castles” built to control the Monnow Valley near the English border.
-
A.
Dolwyddelan Castle
Dolwyddelan Castle is a medieval Welsh fortress in Snowdonia, traditionally associated with the native prince Llywelyn the Great and commanding a strategic mountain pass.
-
B.
Kidwelly Castle
Kidwelly Castle is a well-preserved medieval fortress in southwest Wales, noted for its imposing stone walls and strategic riverside location.
-
C.
Neath Castle
Neath Castle is a medieval Norman fortress ruin located in the town of Neath in South Wales.
-
D.
Carreg Cennen Castle
Carreg Cennen Castle is a dramatic medieval hilltop fortress in southwest Wales, renowned for its striking clifftop setting and extensive ruins.
-
E.
Cyfarthfa Castle
Cyfarthfa Castle is a 19th-century mock-Gothic mansion in Merthyr Tydfil, Wales, historically linked to the iron industry and now serving as a museum and public park.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
fortified site
ⓘ
medieval castle ⓘ scheduled monument ⓘ tourist attraction ⓘ |
| associatedWith |
lords of the Marches
ⓘ
surface form:
Lordship of the Three Castles
lords of the Marches ⓘ
surface form:
Marcher Lords
|
| borderRegion |
England–Wales border
ⓘ
surface form:
English–Welsh border
|
| builtBy | Normans ⓘ |
| builtFor |
border defence
ⓘ
control of local lordship ⓘ |
| builtToControl | Monnow Valley ⓘ |
| controlledRoute | route between Hereford and south Wales ⓘ |
| country | Wales ⓘ |
| currentCondition | ruin ⓘ |
| function |
administrative centre
ⓘ
military stronghold ⓘ |
| hasAlternativeName | Castell Ynysgynwraidd ⓘ |
| hasConstructionMaterial | Old Red Sandstone ⓘ |
| hasFeature |
circular keep
ⓘ
corner towers ⓘ curtain wall ⓘ gatehouse ⓘ inner ward ⓘ moat ⓘ outer ward ⓘ |
| hasHeritageStatus |
Grade II* listed building
ⓘ
scheduled ancient monument ⓘ |
| hasShape | roughly rectangular plan ⓘ |
| hasViewOver | River Monnow floodplain ⓘ |
| locatedIn |
Monmouthshire
ⓘ
Skenfrith ⓘ United Kingdom ⓘ Wales ⓘ |
| locatedOn | River Monnow ⓘ |
| managedBy | Cadw ⓘ |
| near |
Church of St Bridget, Skenfrith
ⓘ
Grosmont Castle ⓘ Monmouth ⓘ White Castle ⓘ |
| openToPublic | yes ⓘ |
| originatedInPeriod | late 11th century ⓘ |
| ownedBy | Crown Estate ⓘ |
| partOf | Three Castles ⓘ |
| rebuiltBy | Hubert de Burgh ⓘ |
| rebuiltInPeriod | early 13th century ⓘ |
| region | southeast Wales ⓘ |
| usedUntilPeriod | 16th century ⓘ |
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: Skenfrith Castle Description of subject: Skenfrith Castle is a medieval riverside fortress in southeast Wales, notable as one of the “Three Castles” built to control the Monnow Valley near the English border.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.