Constantius Chlorus
E39655
Constantius Chlorus was a Roman emperor of the late 3rd and early 4th centuries, best known as a senior ruler in the Tetrarchy and the father of Constantine the Great.
All labels observed (7)
| Label | Occurrences |
|---|---|
| Constantius Chlorus canonical | 37 |
| Constantius I | 2 |
| Constantius I Chlorus | 1 |
| Divus Constantius | 1 |
| Emperor Constantius Chlorus | 1 |
| Gaius Flavius Valerius Constantius | 1 |
| Roman emperor Constantius Chlorus | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T285043 — 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: Constantius Chlorus Context triple: [Diocletian's Tetrarchy, hasEmperor, Constantius Chlorus]
-
A.
Galerius
Galerius was a Roman emperor of the late 3rd and early 4th centuries CE, best known for his role in the Tetrarchy and for intensifying the persecution of Christians in the Eastern Roman Empire.
-
B.
Maximian
Maximian was a Roman emperor who ruled as co-augustus alongside Diocletian during the late 3rd and early 4th centuries, helping to stabilize and reform the empire.
-
C.
Diocletian
Diocletian was a Roman emperor best known for stabilizing and reorganizing the empire through sweeping administrative reforms and establishing the Tetrarchy system of rule.
-
D.
Constantine
Constantine is a historic northeastern Algerian city famed for its dramatic bridges spanning deep gorges and its role as a major cultural and economic center.
-
E.
Flavius
Flavius is a common Roman praenomen and family name frequently borne by late Roman emperors and officials, including Romulus Augustulus.
- 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: Constantius Chlorus Target entity description: Constantius Chlorus was a Roman emperor of the late 3rd and early 4th centuries, best known as a senior ruler in the Tetrarchy and the father of Constantine the Great.
-
A.
Galerius
Galerius was a Roman emperor of the late 3rd and early 4th centuries CE, best known for his role in the Tetrarchy and for intensifying the persecution of Christians in the Eastern Roman Empire.
-
B.
Maximian
Maximian was a Roman emperor who ruled as co-augustus alongside Diocletian during the late 3rd and early 4th centuries, helping to stabilize and reform the empire.
-
C.
Diocletian
Diocletian was a Roman emperor best known for stabilizing and reorganizing the empire through sweeping administrative reforms and establishing the Tetrarchy system of rule.
-
D.
Constantine
Constantine is a historic northeastern Algerian city famed for its dramatic bridges spanning deep gorges and its role as a major cultural and economic center.
-
E.
Flavius
Flavius is a common Roman praenomen and family name frequently borne by late Roman emperors and officials, including Romulus Augustulus.
- F. None of above. chosen
Statements (51)
| Predicate | Object |
|---|---|
| instanceOf |
Roman consul
ⓘ
Roman emperor ⓘ historical figure ⓘ member of the Constantinian dynasty ⓘ tetrarch ⓘ |
| activePeriod |
early 4th century
ⓘ
late 3rd century ⓘ |
| birthDate | c. 250 ⓘ |
| child |
Anastasia (daughter of Constantius Chlorus)
ⓘ
Constantinus Magnus ⓘ
surface form:
Constantine the Great
Eutropia (mother of Constantius) ⓘ
surface form:
Eutropia (daughter of Constantius Chlorus)
Flavia Theodora (daughter of Constantius Chlorus) ⓘ Flavius Dalmatius (the elder) ⓘ Hannibalianus (son of Constantius Chlorus) ⓘ Julius Constantius ⓘ |
| countryOfCitizenship | Roman Empire ⓘ |
| deathDate | 25 July 306 ⓘ |
| deathPlace |
Great Britain
ⓘ
surface form:
Britannia
Eboracum ⓘ York ⓘ |
| epithet | Chlorus ⓘ |
| epithetMeaning | the Pale ⓘ |
| era |
Late Antiquity
ⓘ
surface form:
Late Roman Empire
|
| fullName |
Constantius Chlorus
self-linksurface differs
ⓘ
surface form:
Gaius Flavius Valerius Constantius
|
| knownFor |
being the father of Constantine the Great
ⓘ
role in the establishment and maintenance of the Tetrarchy ⓘ |
| memberOf |
Diocletian's Tetrarchy
ⓘ
surface form:
Tetrarchy
|
| militaryRank | general ⓘ |
| mother | Eutropia (mother of Constantius) ⓘ |
| notableAchievement |
campaigns against Germanic tribes on the Rhine frontier
ⓘ
defeat of the usurper Allectus in Britain ⓘ reconquest of Britain for the Roman Empire ⓘ |
| notableWork | participation in the Tetrarchic system of government ⓘ |
| partner | Helena ⓘ |
| placeOfBurial | unknown, probably in Britain or Gaul ⓘ |
| positionHeld |
Augustus
ⓘ
Caesar ⓘ Roman emperor ⓘ consul of the Roman Empire ⓘ governor of Dalmatia ⓘ praetorian prefect ⓘ |
| predecessor |
Maximian
ⓘ
surface form:
Maximian (as Augustus of the West)
|
| reignAsAugustusOfTheWest | 305–306 ⓘ |
| reignAsCaesarOfTheWest | 293–305 ⓘ |
| reignEnd | 25 July 306 ⓘ |
| reignStart | 1 March 293 ⓘ |
| religion | traditional Roman polytheism ⓘ |
| sexOrGender | male ⓘ |
| spouse | Theodora ⓘ |
| successor |
Constantinus Magnus
ⓘ
surface form:
Constantine the Great
Severus II ⓘ |
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: Constantius Chlorus Description of subject: Constantius Chlorus was a Roman emperor of the late 3rd and early 4th centuries, best known as a senior ruler in the Tetrarchy and the father of Constantine the Great.
Referenced by (44)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Constantine the Great
subject surface form:
Constantine the Great
this entity surface form:
Gaius Flavius Valerius Constantius
subject surface form:
Constantius Chlorus
this entity surface form:
Constantius I
subject surface form:
Constantius Chlorus
this entity surface form:
Divus Constantius
this entity surface form:
Roman emperor Constantius Chlorus
this entity surface form:
Constantius I Chlorus