Peter IV of Bulgaria
E298445
Peter IV of Bulgaria was a medieval Bulgarian tsar who played a key role in the restoration of Bulgarian independence and the establishment of the Second Bulgarian Empire in the late 12th century.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Peter IV of Bulgaria canonical | 8 |
| Peter II of Bulgaria | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2763404 — 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: Peter IV of Bulgaria Context triple: [Second Bulgarian Empire, firstRuler, Peter IV of Bulgaria]
-
A.
Peter I of Bulgaria
Peter I of Bulgaria was a 10th-century tsar of the First Bulgarian Empire known for his long and relatively peaceful reign, during which Bulgaria strengthened its Christianity and diplomatic ties with Byzantium.
-
B.
Ferdinand I of Bulgaria
Ferdinand I of Bulgaria was the ruler who transformed Bulgaria from a principality into an independent kingdom, serving as its prince and later tsar from 1887 to 1918 and leading the country through the Balkan Wars and World War I.
-
C.
Samuel of Bulgaria
Samuel of Bulgaria was a medieval Tsar who led the First Bulgarian Empire at its height around the turn of the 11th century, fiercely resisting Byzantine expansion until its eventual conquest.
-
D.
Simeon I of Bulgaria
Simeon I of Bulgaria was a powerful medieval Bulgarian tsar whose reign (893–927) marked the political and cultural zenith of the First Bulgarian Empire and earned him the epithet "the Great."
-
E.
Boris III of Bulgaria
Boris III of Bulgaria was the Tsar of Bulgaria from 1918 to 1943, known for steering his country through the interwar period and most of World War II while attempting to maintain a degree of independence from Nazi Germany.
- 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: Peter IV of Bulgaria Target entity description: Peter IV of Bulgaria was a medieval Bulgarian tsar who played a key role in the restoration of Bulgarian independence and the establishment of the Second Bulgarian Empire in the late 12th century.
-
A.
Peter I of Bulgaria
Peter I of Bulgaria was a 10th-century tsar of the First Bulgarian Empire known for his long and relatively peaceful reign, during which Bulgaria strengthened its Christianity and diplomatic ties with Byzantium.
-
B.
Ferdinand I of Bulgaria
Ferdinand I of Bulgaria was the ruler who transformed Bulgaria from a principality into an independent kingdom, serving as its prince and later tsar from 1887 to 1918 and leading the country through the Balkan Wars and World War I.
-
C.
Samuel of Bulgaria
Samuel of Bulgaria was a medieval Tsar who led the First Bulgarian Empire at its height around the turn of the 11th century, fiercely resisting Byzantine expansion until its eventual conquest.
-
D.
Simeon I of Bulgaria
Simeon I of Bulgaria was a powerful medieval Bulgarian tsar whose reign (893–927) marked the political and cultural zenith of the First Bulgarian Empire and earned him the epithet "the Great."
-
E.
Boris III of Bulgaria
Boris III of Bulgaria was the Tsar of Bulgaria from 1918 to 1943, known for steering his country through the interwar period and most of World War II while attempting to maintain a degree of independence from Nazi Germany.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
Bulgarian tsar
ⓘ
medieval ruler ⓘ monarch ⓘ |
| alsoKnownAs |
Peter IV of Bulgaria
ⓘ
surface form:
Peter II of Bulgaria
Theodor-Peter ⓘ |
| approximateDeathYear | circa 1197 ⓘ |
| associatedWith |
Bulgarian Orthodox Church
ⓘ
surface form:
Tarnovo Patriarchate
|
| birthPlace |
Veliko Tarnovo Province
ⓘ
surface form:
Tarnovo region
|
| burialPlace | Tarnovo ⓘ |
| capital | Tarnovo ⓘ |
| conflict |
Byzantine–Bulgarian wars
ⓘ
surface form:
Byzantine–Bulgarian wars (late 12th century)
|
| coRuler |
Ivan Asen I
ⓘ
surface form:
Ivan Asen I of Bulgaria
|
| country | Second Bulgarian Empire ⓘ |
| deathPlace | Tarnovo ⓘ |
| dynasty | Asen dynasty ⓘ |
| era | 12th century ⓘ |
| ethnicBackground | Bulgarian ⓘ |
| governmentForm | monarchy ⓘ |
| historicalPeriod | High Middle Ages ⓘ |
| language | Old Bulgarian ⓘ |
| legacy | considered a founder of the Second Bulgarian Empire ⓘ |
| notableFor |
founding the Second Bulgarian Empire
ⓘ
leading the Uprising of Asen and Peter ⓘ restoration of Bulgarian independence from the Byzantine Empire ⓘ |
| opponent |
Byzantine Empire
ⓘ
Isaac II Angelos ⓘ |
| originalName |
Theodor-Peter
ⓘ
surface form:
Theodor
|
| policy | alliance with Cuman tribes ⓘ |
| predecessor | Byzantine rule over Bulgaria ⓘ |
| regionRuled |
Moesia
ⓘ
parts of Macedonia ⓘ parts of Thrace ⓘ |
| reignEnd | 1197 ⓘ |
| reignStart | 1185 ⓘ |
| relative |
Ivan Asen I
ⓘ
surface form:
Ivan Asen I of Bulgaria
Kaloyan of Bulgaria ⓘ |
| religion | Eastern Orthodox Christianity ⓘ |
| significantEvent |
Coronation as tsar in Tarnovo
ⓘ
Uprising of Asen and Peter ⓘ
surface form:
Uprising of Asen and Peter (1185–1186)
|
| sought | recognition of imperial title from other Christian powers ⓘ |
| spouse | Unnamed Cuman princess ⓘ |
| strengthened | Bulgarian Orthodox Church ⓘ |
| successor | Kaloyan of Bulgaria ⓘ |
| suzeraintyRejected |
Isaac II Angelos
ⓘ
surface form:
Byzantine emperor Isaac II Angelos
|
| title |
Emperor of the Bulgarians
ⓘ
Tsar of Bulgaria ⓘ
surface form:
Tsar of the Bulgarians
|
| usedRegnalName | Peter ⓘ |
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: Peter IV of Bulgaria Description of subject: Peter IV of Bulgaria was a medieval Bulgarian tsar who played a key role in the restoration of Bulgarian independence and the establishment of the Second Bulgarian Empire in the late 12th century.
Referenced by (9)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Peter II of Bulgaria