Alexios IV Angelos
E438908
Alexios IV Angelos was a Byzantine emperor whose alliance with the leaders of the Fourth Crusade led to the crusaders’ intervention in Constantinople and the eventual sack of the city in 1204.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Alexios IV Angelos canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T4158915 — 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: Alexios IV Angelos Context triple: [Fourth Crusade, keyFigure, Alexios IV Angelos]
-
A.
Alexios III Komnenos
Alexios III Komnenos was a Byzantine emperor of Trebizond from the 14th century, known for consolidating his realm along the Black Sea coast and patronizing Orthodox monastic institutions.
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B.
Byzantine Emperor Alexios III Angelos
Byzantine Emperor Alexios III Angelos was a late 12th- to early 13th-century ruler of the Byzantine Empire whose weak leadership and mismanagement contributed to the empire’s decline and the events leading up to the Fourth Crusade.
-
C.
John VI Kantakouzenos
John VI Kantakouzenos was a 14th-century Byzantine emperor, statesman, and historian who played a central role in the civil wars and political turmoil of the late Byzantine Empire.
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D.
Manuel Kantakouzenos
Manuel Kantakouzenos was a 14th-century Byzantine prince and military leader who became the first ruler of the Despotate of the Morea in the Peloponnese.
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E.
Andronikos II Palaiologos
Andronikos II Palaiologos was a Byzantine emperor who ruled from 1282 to 1328, overseeing a period of political decline and economic difficulty for the empire.
- 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: Alexios IV Angelos Target entity description: Alexios IV Angelos was a Byzantine emperor whose alliance with the leaders of the Fourth Crusade led to the crusaders’ intervention in Constantinople and the eventual sack of the city in 1204.
-
A.
Alexios III Komnenos
Alexios III Komnenos was a Byzantine emperor of Trebizond from the 14th century, known for consolidating his realm along the Black Sea coast and patronizing Orthodox monastic institutions.
-
B.
Byzantine Emperor Alexios III Angelos
Byzantine Emperor Alexios III Angelos was a late 12th- to early 13th-century ruler of the Byzantine Empire whose weak leadership and mismanagement contributed to the empire’s decline and the events leading up to the Fourth Crusade.
-
C.
John VI Kantakouzenos
John VI Kantakouzenos was a 14th-century Byzantine emperor, statesman, and historian who played a central role in the civil wars and political turmoil of the late Byzantine Empire.
-
D.
Manuel Kantakouzenos
Manuel Kantakouzenos was a 14th-century Byzantine prince and military leader who became the first ruler of the Despotate of the Morea in the Peloponnese.
-
E.
Andronikos II Palaiologos
Andronikos II Palaiologos was a Byzantine emperor who ruled from 1282 to 1328, overseeing a period of political decline and economic difficulty for the empire.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
Byzantine emperor
ⓘ
historical figure ⓘ |
| allianceWith |
Venetian crusaders
ⓘ
leaders of the Fourth Crusade ⓘ |
| associatedWith |
Latin occupation of Constantinople
NERFINISHED
ⓘ
decline of the Byzantine Empire ⓘ |
| causeOfDeath | strangulation ⓘ |
| conflict | civil unrest in Constantinople (1203–1204) ⓘ |
| coRuler | Isaac II Angelos NERFINISHED ⓘ |
| countryOfCitizenship | Byzantine Empire NERFINISHED ⓘ |
| dateOfDeath | 1204 ⓘ |
| dynasty | Angelos dynasty NERFINISHED ⓘ |
| eventLeadingToPower |
capture of Constantinople by crusaders in 1203
ⓘ
restoration of Isaac II Angelos ⓘ |
| familyName | Angelos NERFINISHED ⓘ |
| father | Isaac II Angelos NERFINISHED ⓘ |
| givenName | Alexios NERFINISHED ⓘ |
| historicalPeriod | Late Byzantine period ⓘ |
| houseOrFamily | Angelos NERFINISHED ⓘ |
| imprisonedBy | Alexios V Doukas NERFINISHED ⓘ |
| mannerOfDeath | execution ⓘ |
| mother | Irene of Hungary NERFINISHED ⓘ |
| nobleTitle | Byzantine emperor ⓘ |
| notableEvent |
Fourth Crusade
NERFINISHED
ⓘ
Sack of Constantinople (1204) NERFINISHED ⓘ Siege of Constantinople (1203) NERFINISHED ⓘ |
| notableFor |
inviting the Fourth Crusade to intervene in Byzantine politics
ⓘ
role in events leading to the sack of Constantinople in 1204 ⓘ |
| overthrownBy | Alexios V Doukas NERFINISHED ⓘ |
| placeOfBirth | Constantinople NERFINISHED ⓘ |
| placeOfDeath | Constantinople NERFINISHED ⓘ |
| positionHeld |
Byzantine emperor
ⓘ
Emperor of the Romans NERFINISHED ⓘ |
| predecessor | Alexios III Angelos NERFINISHED ⓘ |
| promise |
large payments and military support against Muslim powers
ⓘ
submission of the Byzantine Church to Rome ⓘ |
| promisedTo | Fourth Crusade leaders ⓘ |
| reasonForOverthrow |
growing unpopularity in Constantinople
ⓘ
inability to pay promised sums to crusaders ⓘ |
| reignEnd | 1204 ⓘ |
| reignStart | 1203 ⓘ |
| religion |
Eastern Orthodox Christianity
ⓘ
surface form:
Eastern Orthodox Church
|
| sexOrGender | male ⓘ |
| successor | Alexios V Doukas NERFINISHED ⓘ |
| titleDuringReign | Alexios IV Komnenos Angelos 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: Alexios IV Angelos Description of subject: Alexios IV Angelos was a Byzantine emperor whose alliance with the leaders of the Fourth Crusade led to the crusaders’ intervention in Constantinople and the eventual sack of the city in 1204.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Alexios III Angelos
subject surface form:
Alexios III Angelos