King Baldwin IV of Jerusalem
E848477
King Baldwin IV of Jerusalem, known as the "Leper King," was the young 12th-century Crusader monarch who famously defended the Kingdom of Jerusalem against Saladin despite suffering from debilitating leprosy.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Baldwin IV of Jerusalem | 3 |
| King Baldwin IV | 1 |
| King Baldwin IV of Jerusalem canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T10194313 — 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: King Baldwin IV of Jerusalem Context triple: [Balian of Ibelin, servedUnder, King Baldwin IV of Jerusalem]
-
A.
Baldwin III of Jerusalem
Baldwin III of Jerusalem was a 12th-century king of the Crusader Kingdom of Jerusalem, noted for his military leadership and political struggles during the era of the Second Crusade.
-
B.
Baldwin II of Jerusalem
Baldwin II of Jerusalem was a 12th-century king of the Crusader state of Jerusalem, known for consolidating and defending the Latin Kingdom in Outremer during the early Crusades.
-
C.
Amalric II of Jerusalem
Amalric II of Jerusalem was a 12th-century king of Jerusalem and Cyprus from the French Lusignan noble family, known for his role in the Crusader states.
-
D.
Amalric, Prince of Tyre
Amalric, Prince of Tyre, was a 13th-century nobleman of the Lusignan family who served as a key political and military leader in the Crusader states and later as governor of Cyprus.
-
E.
Henry II of Jerusalem
Henry II of Jerusalem was a late 13th- to early 14th-century king who ruled both Cyprus and the titular Kingdom of Jerusalem as a member of the Lusignan dynasty.
- 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: King Baldwin IV of Jerusalem Target entity description: King Baldwin IV of Jerusalem, known as the "Leper King," was the young 12th-century Crusader monarch who famously defended the Kingdom of Jerusalem against Saladin despite suffering from debilitating leprosy.
-
A.
Baldwin III of Jerusalem
Baldwin III of Jerusalem was a 12th-century king of the Crusader Kingdom of Jerusalem, noted for his military leadership and political struggles during the era of the Second Crusade.
-
B.
Baldwin II of Jerusalem
Baldwin II of Jerusalem was a 12th-century king of the Crusader state of Jerusalem, known for consolidating and defending the Latin Kingdom in Outremer during the early Crusades.
-
C.
Amalric II of Jerusalem
Amalric II of Jerusalem was a 12th-century king of Jerusalem and Cyprus from the French Lusignan noble family, known for his role in the Crusader states.
-
D.
Amalric, Prince of Tyre
Amalric, Prince of Tyre, was a 13th-century nobleman of the Lusignan family who served as a key political and military leader in the Crusader states and later as governor of Cyprus.
-
E.
Henry II of Jerusalem
Henry II of Jerusalem was a late 13th- to early 14th-century king who ruled both Cyprus and the titular Kingdom of Jerusalem as a member of the Lusignan dynasty.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
Catholic
ⓘ
Crusader leader ⓘ House of Anjou ⓘ King of Jerusalem ⓘ medieval monarch ⓘ nobleman with leprosy ⓘ |
| alliance |
allied with the Knights Hospitaller
ⓘ
allied with the Knights Templar ⓘ |
| birthPlace | Jerusalem NERFINISHED ⓘ |
| birthYear | 1161 ⓘ |
| burialPlace | Church of the Holy Sepulchre NERFINISHED ⓘ |
| causeOfDeath | complications of leprosy ⓘ |
| coronationYear | 1174 ⓘ |
| deathPlace | Jerusalem NERFINISHED ⓘ |
| deathYear | 1185 ⓘ |
| dynasty |
House of Anjou
NERFINISHED
ⓘ
House of Jerusalem NERFINISHED ⓘ |
| education | educated by William of Tyre ⓘ |
| era | 12th century ⓘ |
| father | Amalric I of Jerusalem NERFINISHED ⓘ |
| foreignRelations | negotiated truces with Saladin ⓘ |
| fullName | Baldwin IV of Jerusalem NERFINISHED ⓘ |
| governmentType | feudal monarchy ⓘ |
| healthCondition | leprosy ⓘ |
| historicalPeriod | Crusades NERFINISHED ⓘ |
| knownForBattle |
Battle of Le Forbelet
NERFINISHED
ⓘ
Battle of Montgisard NERFINISHED ⓘ |
| mentor | William of Tyre NERFINISHED ⓘ |
| militaryStrategy | use of rapid cavalry strikes against larger Ayyubid forces ⓘ |
| mother | Agnes of Courtenay NERFINISHED ⓘ |
| nickname |
the Leper
NERFINISHED
ⓘ
the Leper King NERFINISHED ⓘ |
| notableFor |
defending the Kingdom of Jerusalem against Saladin
ⓘ
ruling despite advanced leprosy ⓘ |
| opponent | Saladin NERFINISHED ⓘ |
| policy | attempted to balance baronial factions in the Kingdom of Jerusalem ⓘ |
| predecessor | Amalric I of Jerusalem NERFINISHED ⓘ |
| realm | Kingdom of Jerusalem NERFINISHED ⓘ |
| regent | Raymond III of Tripoli NERFINISHED ⓘ |
| reignEnd | 1185 ⓘ |
| reignStart | 1174 ⓘ |
| religion | Latin Catholic Church NERFINISHED ⓘ |
| sibling |
Isabella I of Jerusalem
NERFINISHED
ⓘ
Sibylla of Jerusalem NERFINISHED ⓘ |
| successionPlan | designated his nephew Baldwin V as heir ⓘ |
| successor | Baldwin V of Jerusalem NERFINISHED ⓘ |
| title |
King of Jerusalem
NERFINISHED
ⓘ
Lord of Oultrejordain NERFINISHED ⓘ |
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: King Baldwin IV of Jerusalem Description of subject: King Baldwin IV of Jerusalem, known as the "Leper King," was the young 12th-century Crusader monarch who famously defended the Kingdom of Jerusalem against Saladin despite suffering from debilitating leprosy.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Balian of Ibelin
this entity surface form:
Baldwin IV of Jerusalem
this entity surface form:
Baldwin IV of Jerusalem
this entity surface form:
King Baldwin IV
this entity surface form:
Baldwin IV of Jerusalem