al-Musta'sim
E52422
Al-Musta'sim was the last Abbasid caliph in Baghdad, whose defeat and death during the Mongol sack of the city in 1258 marked the end of the classical Abbasid Caliphate.
All labels observed (4)
| Label | Occurrences |
|---|---|
| Al-Musta'sim | 2 |
| Abu Ahmad Abdullah al-Musta'sim Billah | 1 |
| al-Musta'sim canonical | 1 |
| al-Musta'sim Billah | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T389562 — 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: al-Musta'sim Context triple: [Abbasid Caliphate, lastRuler, al-Musta'sim]
-
A.
al-Mu'tasim
Al-Mu'tasim was an Abbasid caliph (r. 833–842 CE) known for founding the city of Samarra and expanding the use of Turkish slave soldiers in the caliphal army.
-
B.
Sulayman
Sulayman is the Islamic name for King Solomon, a prophet and wise monarch revered in Abrahamic traditions for his justice, wisdom, and leadership.
-
C.
Marwan II
Marwan II was the final Umayyad caliph, whose defeat marked the end of Umayyad rule in the Middle East and the rise of the Abbasid Caliphate.
-
D.
Ibn Muqla
Ibn Muqla was a 10th-century Abbasid vizier and master calligrapher renowned for codifying the proportional rules that shaped classical Arabic scripts, especially Naskh.
-
E.
Al-Malik
Al-Malik is one of the names of Allah in Islam, signifying Him as the absolute Sovereign and King over all creation.
- 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: al-Musta'sim Target entity description: Al-Musta'sim was the last Abbasid caliph in Baghdad, whose defeat and death during the Mongol sack of the city in 1258 marked the end of the classical Abbasid Caliphate.
-
A.
al-Mu'tasim
Al-Mu'tasim was an Abbasid caliph (r. 833–842 CE) known for founding the city of Samarra and expanding the use of Turkish slave soldiers in the caliphal army.
-
B.
Sulayman
Sulayman is the Islamic name for King Solomon, a prophet and wise monarch revered in Abrahamic traditions for his justice, wisdom, and leadership.
-
C.
Marwan II
Marwan II was the final Umayyad caliph, whose defeat marked the end of Umayyad rule in the Middle East and the rise of the Abbasid Caliphate.
-
D.
Ibn Muqla
Ibn Muqla was a 10th-century Abbasid vizier and master calligrapher renowned for codifying the proportional rules that shaped classical Arabic scripts, especially Naskh.
-
E.
Al-Malik
Al-Malik is one of the names of Allah in Islam, signifying Him as the absolute Sovereign and King over all creation.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
Abbasid caliph
ⓘ
Caliph ⓘ Muslim ruler ⓘ |
| associatedWith |
Abbasid Caliphate in Baghdad
ⓘ
linked to:
Abbasid Caliphate
Islamic Golden Age (late phase) ⓘ
linked to:
Islamic Golden Age
|
| associatedWithEvent |
Fall of Baghdad (1258)
ⓘ
linked to:
Sack of Baghdad (1258)
|
| birthPlace | Baghdad ⓘ |
| burialPlace | Baghdad (traditional attribution) ⓘ |
| capitalOfRealm | Baghdad ⓘ |
| contemporaryOf |
Hulagu Khan
ⓘ
linked to:
Hülegü Khan
|
| countryOfRule | Abbasid Caliphate ⓘ |
| deathCause | Execution by the Mongols ⓘ |
| deathDate | 1258 ⓘ |
| deathPlace | Baghdad ⓘ |
| dynasty |
Abbasid dynasty
ⓘ
linked to:
Abbasid Caliphate
|
| endOfReignReason |
Conquest of Baghdad by the Mongols
ⓘ
linked to:
Sack of Baghdad (1258)
|
| era | Late Abbasid period ⓘ |
| father | al-Mustansir ⓘ |
| fullName |
Abu Ahmad Abdullah al-Musta'sim Billah
ⓘ
linked to:
al-Musta'sim
|
| governedCity | Baghdad ⓘ |
| historicalSignificance |
His death marked the end of the classical Abbasid Caliphate in Baghdad
ⓘ
Last Abbasid caliph to rule in Baghdad ⓘ |
| house | House of Abbas ⓘ |
| killedBy |
Mongol Empire
ⓘ
forces of Hulagu Khan ⓘ
linked to:
Mongol conquests
|
| language | Arabic ⓘ |
| legacy | Symbol of the end of Abbasid political power in Iraq ⓘ |
| notableEvent |
Mongol sack of Baghdad (1258)
ⓘ
Mongol siege of Baghdad (1258) ⓘ
linked to:
Sack of Baghdad (1258)
|
| notableFor |
Failure to effectively organize defense of Baghdad
ⓘ
Weak leadership during the Mongol advance ⓘ |
| positionHeld |
Abbasid caliph in Baghdad
ⓘ
Caliph of the Abbasid Caliphate ⓘ |
| predecessor | al-Mustansir ⓘ |
| regionRuled |
Iraq
ⓘ
parts of the central Islamic lands ⓘ |
| regnalName |
al-Musta'sim Billah
ⓘ
linked to:
al-Musta'sim
|
| reignEnd | 1258 ⓘ |
| reignStart | 1242 ⓘ |
| religion |
Islam
ⓘ
Sunni Islam ⓘ |
| successor |
Abbasid caliphs in Cairo
ⓘ
al-Mustansir II ⓘ
linked to:
al-Mustansir
|
| successorState |
Mongol Ilkhanate in Iraq
ⓘ
linked to:
Mongol Ilkhanate
|
| title |
Caliph
ⓘ
Commander of the Faithful ⓘ
linked to:
Caliph
|
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: al-Musta'sim Description of subject: Al-Musta'sim was the last Abbasid caliph in Baghdad, whose defeat and death during the Mongol sack of the city in 1258 marked the end of the classical Abbasid Caliphate.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: al-Musta'sim
linked to: al-Musta'sim
linked to: al-Musta'sim
linked to: al-Musta'sim