Oystermouth Castle
E404710
Oystermouth Castle is a medieval stone fortress overlooking Swansea Bay in Wales, known for its Norman origins and well-preserved historic ruins.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Oystermouth Castle canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T3968845 — 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: Oystermouth Castle Context triple: [City and County of Swansea, hasLandmark, Oystermouth Castle]
-
A.
Monmouth Castle
Monmouth Castle is a historic medieval fortress in Monmouth, Wales, best known as the birthplace of King Henry V of England.
-
B.
Bodelwyddan Castle
Bodelwyddan Castle is a 19th-century Gothic Revival country house and former historic house museum in North Wales, noted for its distinctive architecture and parkland setting.
-
C.
Sandown Castle
Sandown Castle was a coastal artillery fort on the Kent coast of England, built by Henry VIII as part of his chain of defenses against invasion.
-
D.
Beaumaris Castle
Beaumaris Castle is a late 13th-century concentric medieval fortress on the Isle of Anglesey in Wales, renowned for its symmetrical design and status as part of the UNESCO-listed "Castles and Town Walls of King Edward in Gwynedd."
-
E.
Aberystwyth Castle
Aberystwyth Castle is a ruined medieval fortress on the coast of Ceredigion, Wales, notable for its strategic seaside location and historical role in Welsh-English conflicts.
- 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: Oystermouth Castle Target entity description: Oystermouth Castle is a medieval stone fortress overlooking Swansea Bay in Wales, known for its Norman origins and well-preserved historic ruins.
-
A.
Monmouth Castle
Monmouth Castle is a historic medieval fortress in Monmouth, Wales, best known as the birthplace of King Henry V of England.
-
B.
Bodelwyddan Castle
Bodelwyddan Castle is a 19th-century Gothic Revival country house and former historic house museum in North Wales, noted for its distinctive architecture and parkland setting.
-
C.
Sandown Castle
Sandown Castle was a coastal artillery fort on the Kent coast of England, built by Henry VIII as part of his chain of defenses against invasion.
-
D.
Beaumaris Castle
Beaumaris Castle is a late 13th-century concentric medieval fortress on the Isle of Anglesey in Wales, renowned for its symmetrical design and status as part of the UNESCO-listed "Castles and Town Walls of King Edward in Gwynedd."
-
E.
Aberystwyth Castle
Aberystwyth Castle is a ruined medieval fortress on the coast of Ceredigion, Wales, notable for its strategic seaside location and historical role in Welsh-English conflicts.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
medieval castle
ⓘ
scheduled monument ⓘ stone fortress ⓘ tourist attraction ⓘ |
| architecturalStyle | Norman architecture ⓘ |
| builder | de Londres family ⓘ |
| condition | ruin ⓘ |
| country | Wales ⓘ |
| foundedBy | Normans ⓘ |
| hasFeature |
arrow slits
ⓘ
battlements ⓘ chapel ⓘ curtain walls ⓘ defensive towers ⓘ gatehouse ⓘ inner ward ⓘ keep ⓘ outer ward ⓘ vaulted undercroft ⓘ |
| hasTourismActivity |
educational visits
ⓘ
guided tours ⓘ heritage events ⓘ |
| hasViewOf | Swansea Bay ⓘ |
| heritageDesignation |
Grade I listed building
ⓘ
Scheduled Ancient Monument ⓘ |
| inception | 12th century ⓘ |
| laterOwner | de Braose family ⓘ |
| locatedIn |
Mumbles
ⓘ
Oystermouth ⓘ |
| locatedInAdministrativeTerritory | City and County of Swansea ⓘ |
| locatedInCountry | United Kingdom ⓘ |
| locatedInHistoricCounty | Glamorgan ⓘ |
| locatedNear | Swansea ⓘ |
| locatedOn | hill overlooking Swansea Bay ⓘ |
| materialUsed | stone ⓘ |
| notableFor |
Norman origins
ⓘ
well-preserved medieval masonry ⓘ |
| openToPublic | true ⓘ |
| operator |
City and County of Swansea Council
ⓘ
linked to:
Swansea Council
|
| overlooks | Swansea Bay ⓘ |
| partOf | Norman defensive network in South Wales ⓘ |
| region | South Wales ⓘ |
| underwentRestoration |
19th century
ⓘ
20th century ⓘ 21st century ⓘ |
| usedFor |
administrative centre
ⓘ
military defence ⓘ seigneurial residence ⓘ |
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: Oystermouth Castle Description of subject: Oystermouth Castle is a medieval stone fortress overlooking Swansea Bay in Wales, known for its Norman origins and well-preserved historic ruins.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.