Infante Henry, Duke of Viseu
E551409
Infante Henry, Duke of Viseu, better known as Henry the Navigator, was a 15th-century Portuguese prince who played a key role in the early days of the Age of Discovery by sponsoring maritime exploration along the West African coast.
All labels observed (4)
| Label | Occurrences |
|---|---|
| Diogo, Duke of Viseu | 1 |
| Infante Henrique of Portugal | 1 |
| Infante Henrique of Portugal, Cardinal-King | 1 |
| Infante Henry, Duke of Viseu canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4891205 — 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: Infante Henry, Duke of Viseu Context triple: [Philippa of Lancaster, child, Infante Henry, Duke of Viseu]
-
A.
Afonso, Prince of Portugal
Afonso, Prince of Portugal was the eldest son and heir apparent of King John III of Portugal, whose early death prevented him from ascending the throne.
-
B.
Sancho II of Portugal
Sancho II of Portugal was a 13th-century Portuguese king whose troubled reign was marked by internal conflicts and eventual deposition in favor of his brother.
-
C.
Duarte I of Portugal
Duarte I of Portugal was a 15th-century King of Portugal from the Avis dynasty, known for his pious character and for continuing the early phases of Portuguese maritime expansion.
-
D.
Afonso of Portugal
Afonso of Portugal was a 15th-century Portuguese infante and nobleman of the Avis dynasty, known for his role in the political struggles of his time and his close ties to the royal family.
-
E.
Sancho I of Portugal
Sancho I of Portugal was the second king of Portugal, known for consolidating the young kingdom’s independence and promoting its territorial expansion and settlement.
- 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: Infante Henry, Duke of Viseu Target entity description: Infante Henry, Duke of Viseu, better known as Henry the Navigator, was a 15th-century Portuguese prince who played a key role in the early days of the Age of Discovery by sponsoring maritime exploration along the West African coast.
-
A.
Afonso, Prince of Portugal
Afonso, Prince of Portugal was the eldest son and heir apparent of King John III of Portugal, whose early death prevented him from ascending the throne.
-
B.
Sancho II of Portugal
Sancho II of Portugal was a 13th-century Portuguese king whose troubled reign was marked by internal conflicts and eventual deposition in favor of his brother.
-
C.
Duarte I of Portugal
Duarte I of Portugal was a 15th-century King of Portugal from the Avis dynasty, known for his pious character and for continuing the early phases of Portuguese maritime expansion.
-
D.
Afonso of Portugal
Afonso of Portugal was a 15th-century Portuguese infante and nobleman of the Avis dynasty, known for his role in the political struggles of his time and his close ties to the royal family.
-
E.
Sancho I of Portugal
Sancho I of Portugal was the second king of Portugal, known for consolidating the young kingdom’s independence and promoting its territorial expansion and settlement.
- F. None of above. chosen
Statements (52)
| Predicate | Object |
|---|---|
| instanceOf |
House of Aviz member
ⓘ
Portuguese prince ⓘ human ⓘ navigator ⓘ patron of exploration ⓘ |
| alsoKnownAs |
Henry the Navigator
NERFINISHED
ⓘ
Infante Dom Henrique NERFINISHED ⓘ |
| burialPlace | Batalha Monastery NERFINISHED ⓘ |
| countryOfCitizenship | Kingdom of Portugal NERFINISHED ⓘ |
| dateOfBirth | 1394-03-04 ⓘ |
| dateOfDeath | 1460-11-13 ⓘ |
| era |
15th century
ⓘ
Age of Exploration ⓘ
surface form:
Age of Discovery
|
| father | John I of Portugal NERFINISHED ⓘ |
| founded | navigation center at Sagres ⓘ |
| givenName | Henry NERFINISHED ⓘ |
| goal |
expanding Portuguese influence in the Atlantic
ⓘ
finding a sea route to West African gold ⓘ seeking a maritime route to Asia ⓘ |
| memberOf | House of Aviz NERFINISHED ⓘ |
| militaryRank | commander in the conquest of Ceuta ⓘ |
| mother | Philippa of Lancaster NERFINISHED ⓘ |
| nobleTitle |
Duke of Viseo
NERFINISHED
ⓘ
Duke of Viseu NERFINISHED ⓘ Lord of Covilhã NERFINISHED ⓘ |
| notableFor |
development of Atlantic navigation
ⓘ
early involvement in the Atlantic slave trade ⓘ initiating the Age of Discovery ⓘ patronage of exploration beyond Cape Bojador ⓘ promoting exploration of the West African coast ⓘ sponsoring early Portuguese maritime exploration ⓘ supporting voyages to Madeira and the Azores ⓘ |
| participatedIn | Portuguese conquest of Ceuta NERFINISHED ⓘ |
| patronOf |
Gil Eanes
NERFINISHED
ⓘ
explorers of the West African coast ⓘ |
| placeOfBirth |
Kingdom of Portugal
NERFINISHED
ⓘ
Porto NERFINISHED ⓘ |
| placeOfDeath |
Algarve
NERFINISHED
ⓘ
Kingdom of Portugal NERFINISHED ⓘ Sagres NERFINISHED ⓘ |
| positionHeld |
Governor of the Algarve
ⓘ
Grand Master of the Order of Christ NERFINISHED ⓘ |
| religion | Roman Catholicism ⓘ |
| residence |
Algarve
NERFINISHED
ⓘ
Sagres NERFINISHED ⓘ |
| sexOrGender | male ⓘ |
| sibling |
Edward of Portugal
NERFINISHED
ⓘ
Ferdinand the Holy Prince NERFINISHED ⓘ Isabella of Portugal, Duchess of Burgundy NERFINISHED ⓘ John, Constable of Portugal NERFINISHED ⓘ Peter, Duke of Coimbra NERFINISHED ⓘ |
| yearOfEvent | 1415 ⓘ |
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: Infante Henry, Duke of Viseu Description of subject: Infante Henry, Duke of Viseu, better known as Henry the Navigator, was a 15th-century Portuguese prince who played a key role in the early days of the Age of Discovery by sponsoring maritime exploration along the West African coast.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Diogo, Duke of Viseu
this entity surface form:
Infante Henrique of Portugal
this entity surface form:
Infante Henrique of Portugal, Cardinal-King