Caer Drewyn hillfort
E873294
Caer Drewyn hillfort is an Iron Age hillfort in Denbighshire, Wales, known for its well-preserved earthworks and commanding views over the Dee Valley near Corwen.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Caer Drewyn hillfort canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T10570962 — 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: Caer Drewyn hillfort Context triple: [Corwen, hasNearbyHistoricSite, Caer Drewyn hillfort]
-
A.
Caer y Twr hillfort
Caer y Twr hillfort is an Iron Age defensive settlement located on the slopes of Holyhead Mountain on Anglesey in Wales.
-
B.
Old Oswestry Hillfort
Old Oswestry Hillfort is a well-preserved Iron Age hillfort in Shropshire, England, renowned for its extensive earthworks and archaeological significance.
-
C.
Bryn Celli Ddu
Bryn Celli Ddu is a Neolithic passage tomb and ceremonial monument on the island of Anglesey in Wales, noted for its prehistoric burial chamber and alignment with the summer solstice sunrise.
-
D.
Dinefwr Castle
Dinefwr Castle is a medieval Welsh fortress in Carmarthenshire, historically associated with the princes of Deheubarth and renowned for its picturesque hilltop ruins overlooking the surrounding countryside.
-
E.
Crymlyn Bog
Crymlyn Bog is a large, ecologically important lowland wetland and nature reserve in South Wales, noted for its rich biodiversity and rare habitats.
- 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: Caer Drewyn hillfort Target entity description: Caer Drewyn hillfort is an Iron Age hillfort in Denbighshire, Wales, known for its well-preserved earthworks and commanding views over the Dee Valley near Corwen.
-
A.
Caer y Twr hillfort
Caer y Twr hillfort is an Iron Age defensive settlement located on the slopes of Holyhead Mountain on Anglesey in Wales.
-
B.
Old Oswestry Hillfort
Old Oswestry Hillfort is a well-preserved Iron Age hillfort in Shropshire, England, renowned for its extensive earthworks and archaeological significance.
-
C.
Bryn Celli Ddu
Bryn Celli Ddu is a Neolithic passage tomb and ceremonial monument on the island of Anglesey in Wales, noted for its prehistoric burial chamber and alignment with the summer solstice sunrise.
-
D.
Dinefwr Castle
Dinefwr Castle is a medieval Welsh fortress in Carmarthenshire, historically associated with the princes of Deheubarth and renowned for its picturesque hilltop ruins overlooking the surrounding countryside.
-
E.
Crymlyn Bog
Crymlyn Bog is a large, ecologically important lowland wetland and nature reserve in South Wales, noted for its rich biodiversity and rare habitats.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
Iron Age hillfort
ⓘ
archaeological site ⓘ scheduled monument ⓘ |
| access | public footpath ⓘ |
| category |
Hillforts in Denbighshire
ⓘ
Iron Age sites in Wales ⓘ Scheduled monuments in Denbighshire ⓘ |
| country | Wales ⓘ |
| elevation | hilltop ⓘ |
| function |
defensive stronghold
ⓘ
settlement enclosure ⓘ |
| gridReferenceSystem | OS grid reference ⓘ |
| hasAccessType | open access land ⓘ |
| hasArchaeologicalInterest |
Iron Age occupation evidence
ⓘ
prehistoric defensive architecture ⓘ |
| hasConservationStatus | protected archaeological site ⓘ |
| hasFeature |
defensive banks
ⓘ
ditches ⓘ stone ramparts ⓘ well-preserved earthworks ⓘ |
| hasMaterial |
earth
ⓘ
stone ⓘ |
| hasNameInWelsh | Caer Drewyn ⓘ |
| hasShape | irregular enclosure ⓘ |
| hasView |
Berwyn Mountains
ⓘ
Dee Valley ⓘ |
| heritageDesignation | Scheduled Ancient Monument ⓘ |
| isPartOf | historic landscape of the Dee Valley ⓘ |
| locatedIn |
Denbighshire
ⓘ
United Kingdom ⓘ Wales ⓘ |
| locatedInHistoricCounty | Merionethshire ⓘ |
| locatedNear | Corwen ⓘ |
| locatedOn | hill above Corwen ⓘ |
| managedBy | Cadw ⓘ |
| nearbyWaterBody | River Dee ⓘ |
| nearestTown | Corwen ⓘ |
| notableFor |
commanding views over Dee Valley
ⓘ
state of preservation ⓘ |
| overlooks | Dee Valley ⓘ |
| period | Iron Age ⓘ |
| region | North Wales ⓘ |
| surroundedBy | countryside ⓘ |
| terrain | upland ⓘ |
| usedDuring | Iron Age ⓘ |
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: Caer Drewyn hillfort Description of subject: Caer Drewyn hillfort is an Iron Age hillfort in Denbighshire, Wales, known for its well-preserved earthworks and commanding views over the Dee Valley near Corwen.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject linked to:
CORWEN