Casimir II the Just
E1018152
Casimir II the Just was a 12th-century Duke of Kraków and High Duke of Poland known for his efforts to stabilize the fragmented Polish realm and his reputation for fairness in governance.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Casimir II the Just canonical | 8 |
How this entity was disambiguated
This entity first appeared as the object of triple T12952648 — 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: Casimir II the Just Context triple: [Bolesław III Wrymouth, child, Casimir II the Just]
-
A.
Casimir I the Restorer
Casimir I the Restorer was an 11th-century Polish duke who rebuilt and reunified the Polish state after a period of crisis and fragmentation, laying foundations for its later strength under the Piast dynasty.
-
B.
Kazimierz III of Gniewkowo
Kazimierz III of Gniewkowo was a 14th-century Polish duke from the Piast dynasty who ruled the small duchy of Gniewkowo in the Kuyavian region.
-
C.
Bolesław IV the Curly
Bolesław IV the Curly was a 12th-century Polish duke from the Piast dynasty who ruled as High Duke of Poland during the period of regional fragmentation.
-
D.
King Casimir III the Great
King Casimir III the Great was a 14th-century King of Poland renowned for strengthening the Polish state through legal reforms, territorial expansion, and economic development.
-
E.
Władysław I the Elbow-high
Władysław I the Elbow-high was the early 14th-century king who reunified the fragmented Polish lands and restored the Polish kingdom under the Piast 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: Casimir II the Just Target entity description: Casimir II the Just was a 12th-century Duke of Kraków and High Duke of Poland known for his efforts to stabilize the fragmented Polish realm and his reputation for fairness in governance.
-
A.
Casimir I the Restorer
Casimir I the Restorer was an 11th-century Polish duke who rebuilt and reunified the Polish state after a period of crisis and fragmentation, laying foundations for its later strength under the Piast dynasty.
-
B.
Kazimierz III of Gniewkowo
Kazimierz III of Gniewkowo was a 14th-century Polish duke from the Piast dynasty who ruled the small duchy of Gniewkowo in the Kuyavian region.
-
C.
Bolesław IV the Curly
Bolesław IV the Curly was a 12th-century Polish duke from the Piast dynasty who ruled as High Duke of Poland during the period of regional fragmentation.
-
D.
King Casimir III the Great
King Casimir III the Great was a 14th-century King of Poland renowned for strengthening the Polish state through legal reforms, territorial expansion, and economic development.
-
E.
Władysław I the Elbow-high
Władysław I the Elbow-high was the early 14th-century king who reunified the fragmented Polish lands and restored the Polish kingdom under the Piast dynasty.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
Duke of Kraków
ⓘ
High Duke of Poland ⓘ Piast dynasty member ⓘ human ⓘ |
| birthPlace | Kraków NERFINISHED ⓘ |
| child |
Adelaide of Poland
NERFINISHED
ⓘ
Bolesław of Kuyavia NERFINISHED ⓘ Konrad I of Masovia NERFINISHED ⓘ Leszek I the White NERFINISHED ⓘ Odon of Poznań NERFINISHED ⓘ |
| countryOfCitizenship | Kingdom of Poland NERFINISHED ⓘ |
| deathPlace | Kraków NERFINISHED ⓘ |
| epithet | the Just NERFINISHED ⓘ |
| father | Bolesław III Wrymouth NERFINISHED ⓘ |
| givenName | Casimir NERFINISHED ⓘ |
| heritage | Polish ⓘ |
| knownAs | Kazimierz II Sprawiedliwy NERFINISHED ⓘ |
| languageOfWorkOrName |
Latin
ⓘ
Polish ⓘ |
| memberOf | Piast dynasty NERFINISHED ⓘ |
| mother | Salomea of Berg NERFINISHED ⓘ |
| nobleFamily | Piast dynasty NERFINISHED ⓘ |
| notableFor |
efforts to stabilize the fragmented Polish realm
ⓘ
reputation for fairness in governance ⓘ |
| occupation |
duke
ⓘ
ruler ⓘ |
| partOf | fragmentation period of Poland ⓘ |
| policy |
seeking compromise among Piast dukes
ⓘ
strengthening ducal authority in Kraków ⓘ |
| positionHeld |
Duke of Kraków
NERFINISHED
ⓘ
Duke of Sandomierz NERFINISHED ⓘ High Duke of Poland NERFINISHED ⓘ |
| realm |
Duchy of Kraków
NERFINISHED
ⓘ
Duchy of Sandomierz NERFINISHED ⓘ Seniorate Province of Poland NERFINISHED ⓘ |
| religion |
Roman Catholicism
ⓘ
surface form:
Roman Catholic Church
|
| residence | Wawel Castle NERFINISHED ⓘ |
| sexOrGender | male ⓘ |
| sibling |
Agnes of Poland
NERFINISHED
ⓘ
Bolesław IV the Curly NERFINISHED ⓘ Henry of Sandomierz NERFINISHED ⓘ Mieszko III the Old NERFINISHED ⓘ Władysław II the Exile NERFINISHED ⓘ |
| spouse | Helen of Znojmo NERFINISHED ⓘ |
| succeeded | Mieszko III the Old NERFINISHED ⓘ |
| timePeriod | 12th century ⓘ |
| title |
Duke of Kraków
NERFINISHED
ⓘ
Duke of Sandomierz NERFINISHED ⓘ High Duke of Poland 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: Casimir II the Just Description of subject: Casimir II the Just was a 12th-century Duke of Kraków and High Duke of Poland known for his efforts to stabilize the fragmented Polish realm and his reputation for fairness in governance.
Referenced by (8)
Full triples — surface form annotated when it differs from this entity's canonical label.