Treaty of Worcester (1218)
E909411
The Treaty of Worcester (1218) was an agreement between King Henry III of England and Llywelyn the Great that confirmed and extended Llywelyn’s authority over much of Wales in return for his homage to the English crown.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Treaty of Worcester (1218) canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T11165848 — 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: Treaty of Worcester (1218) Context triple: [Llywelyn the Great, treaty, Treaty of Worcester (1218)]
-
A.
Treaty of Windsor (1175)
The Treaty of Windsor (1175) was an agreement between England’s King Henry II and the Irish High King Ruaidrí Ua Conchobair that formalized English overlordship in Ireland while recognizing Ruaidrí’s authority over much of the island.
-
B.
Treaty of Salisbury (1289)
The Treaty of Salisbury (1289) was a medieval diplomatic agreement between Scotland and England that helped set the terms for the proposed marriage of Margaret, the Maid of Norway, to Edward of Caernarfon and shaped the succession to the Scottish throne.
-
C.
Treaty of Wedmore
The Treaty of Wedmore was the late 9th-century agreement between Alfred the Great and Viking leader Guthrum that effectively ended major Viking incursions into Wessex and laid the groundwork for the Danelaw in England.
-
D.
Treaty of Wallingford
The Treaty of Wallingford was a 1153 agreement that ended the civil war in England between supporters of King Stephen and Empress Matilda by recognizing Stephen as king while naming Matilda’s son Henry (the future Henry II) as his heir.
-
E.
Anglo-Scottish Treaty of 1237
The Anglo-Scottish Treaty of 1237, commonly known as the Treaty of York, was a medieval agreement that formally defined much of the border between England and Scotland.
- 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: Treaty of Worcester (1218) Target entity description: The Treaty of Worcester (1218) was an agreement between King Henry III of England and Llywelyn the Great that confirmed and extended Llywelyn’s authority over much of Wales in return for his homage to the English crown.
-
A.
Treaty of Windsor (1175)
The Treaty of Windsor (1175) was an agreement between England’s King Henry II and the Irish High King Ruaidrí Ua Conchobair that formalized English overlordship in Ireland while recognizing Ruaidrí’s authority over much of the island.
-
B.
Treaty of Salisbury (1289)
The Treaty of Salisbury (1289) was a medieval diplomatic agreement between Scotland and England that helped set the terms for the proposed marriage of Margaret, the Maid of Norway, to Edward of Caernarfon and shaped the succession to the Scottish throne.
-
C.
Treaty of Wedmore
The Treaty of Wedmore was the late 9th-century agreement between Alfred the Great and Viking leader Guthrum that effectively ended major Viking incursions into Wessex and laid the groundwork for the Danelaw in England.
-
D.
Treaty of Wallingford
The Treaty of Wallingford was a 1153 agreement that ended the civil war in England between supporters of King Stephen and Empress Matilda by recognizing Stephen as king while naming Matilda’s son Henry (the future Henry II) as his heir.
-
E.
Anglo-Scottish Treaty of 1237
The Anglo-Scottish Treaty of 1237, commonly known as the Treaty of York, was a medieval agreement that formally defined much of the border between England and Scotland.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
medieval treaty
ⓘ
treaty ⓘ |
| appliesToTerritory |
Kingdom of England
ⓘ
Wales ⓘ |
| chronologyWithinReignOf | Henry III of England ⓘ |
| country | Kingdom of England ⓘ |
| dateSigned | 1218 ⓘ |
| follows |
First Barons' War
ⓘ
regency government of Henry III of England ⓘ |
| hasCause |
English crown's need to secure peace in Wales during Henry III's minority
ⓘ
Llywelyn the Great's military and political successes in Wales ⓘ |
| hasEffect |
acknowledged Llywelyn the Great's overlordship over other Welsh princes
ⓘ
confirmed Llywelyn the Great's authority over much of Wales ⓘ defined feudal relationship between Llywelyn the Great and Henry III of England ⓘ expanded the territorial reach of Gwynedd ⓘ extended Llywelyn the Great's authority over much of Wales ⓘ formalized Llywelyn the Great's homage to the English crown ⓘ integrated Welsh rulers into the English feudal system ⓘ limited direct English royal authority in parts of Wales ⓘ recognized Llywelyn the Great as dominant Welsh ruler ⓘ strengthened the position of the Prince of Gwynedd ⓘ temporarily stabilized Anglo-Welsh relations ⓘ |
| isPartOf |
Anglo-Welsh treaties
ⓘ
history of medieval England ⓘ history of medieval Wales ⓘ |
| language | Latin ⓘ |
| legalForm |
feudal agreement
ⓘ
royal charter ⓘ |
| participant |
English crown
ⓘ
linked to:
English Crown
Principality of Gwynedd ⓘ
linked to:
Kingdom of Gwynedd
Welsh principalities ⓘ |
| placeSigned | Worcester ⓘ |
| recognizedTitle |
Llywelyn the Great as princeps Wallie (prince of Wales) in practice if not formal title
ⓘ
linked to:
Llywelyn the Great
|
| relatedTo |
Treaty of Aberdyfi (1216)
ⓘ
Treaty of Montgomery (1267) ⓘ Welsh Wars of Independence ⓘ
linked to:
Welsh Wars
|
| signatory |
Henry III of England
ⓘ
Llywelyn ap Iorwerth ⓘ
linked to:
Llywelyn the Great
Llywelyn the Great ⓘ |
| signatoryTitle |
King of England
ⓘ
Prince of Gwynedd ⓘ |
| timePeriod |
13th century
ⓘ
High Middle Ages ⓘ |
| topic |
Anglo-Welsh relations
ⓘ
feudal homage ⓘ overlordship of Welsh princes ⓘ territorial control in Wales ⓘ |
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: Treaty of Worcester (1218) Description of subject: The Treaty of Worcester (1218) was an agreement between King Henry III of England and Llywelyn the Great that confirmed and extended Llywelyn’s authority over much of Wales in return for his homage to the English crown.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.