Fortress of Sagres
E230700
The Fortress of Sagres is a historic coastal stronghold in Portugal’s Algarve region, long associated with maritime exploration and the legacy of Prince Henry the Navigator.
All labels observed (5)
| Label | Occurrences |
|---|---|
| Fortaleza de Sagres | 3 |
| Fortress of Sagres canonical | 1 |
| Sagres | 1 |
| Sagres Fortress | 1 |
| School of Sagres | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2044096 — 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: Fortress of Sagres Context triple: [Municipality of Vila do Bispo, hasNotableSite, Fortress of Sagres]
-
A.
São Jorge Castle
São Jorge Castle is a historic Moorish-era fortress and popular viewpoint overlooking central Lisbon and the Tagus River.
-
B.
Silves Castle
Silves Castle is a well-preserved medieval Moorish fortress in the town of Silves in Portugal’s Algarve region, known for its red sandstone walls and historical significance.
-
C.
Castelo de Vide
Castelo de Vide is a historic hilltop town in Portugal’s Alentejo region, known for its well-preserved medieval castle and Jewish quarter.
-
D.
Castelo de Tavira
Castelo de Tavira is a historic medieval castle in the town of Tavira in Portugal’s Algarve region, known for its preserved walls, towers, and panoramic views over the city.
-
E.
Tavira Tower
Tavira Tower is an 18th-century watchtower in Cádiz, Spain, best known for its historic role as a lookout point and for housing a popular camera obscura offering panoramic views of the city.
- 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: Fortress of Sagres Target entity description: The Fortress of Sagres is a historic coastal stronghold in Portugal’s Algarve region, long associated with maritime exploration and the legacy of Prince Henry the Navigator.
-
A.
São Jorge Castle
São Jorge Castle is a historic Moorish-era fortress and popular viewpoint overlooking central Lisbon and the Tagus River.
-
B.
Silves Castle
Silves Castle is a well-preserved medieval Moorish fortress in the town of Silves in Portugal’s Algarve region, known for its red sandstone walls and historical significance.
-
C.
Castelo de Vide
Castelo de Vide is a historic hilltop town in Portugal’s Alentejo region, known for its well-preserved medieval castle and Jewish quarter.
-
D.
Castelo de Tavira
Castelo de Tavira is a historic medieval castle in the town of Tavira in Portugal’s Algarve region, known for its preserved walls, towers, and panoramic views over the city.
-
E.
Tavira Tower
Tavira Tower is an 18th-century watchtower in Cádiz, Spain, best known for its historic role as a lookout point and for housing a popular camera obscura offering panoramic views of the city.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
cultural heritage site
ⓘ
fortress ⓘ tourist attraction ⓘ |
| architecturalStyle | military architecture ⓘ |
| associatedWith |
Portuguese Discoveries
ⓘ
linked to:
Age of Exploration
Portuguese maritime exploration ⓘ Prince Henry the Navigator ⓘ
linked to:
Henry the Navigator
|
| category |
Buildings and structures in Faro District
ⓘ
Coastal fortifications in Portugal ⓘ Forts in Portugal ⓘ Tourist attractions in Algarve ⓘ |
| country | Portugal ⓘ |
| destroyedBy | Francis Drake ⓘ |
| hasPart |
artillery platforms
ⓘ
bastions ⓘ chapel of Nossa Senhora da Graça ⓘ
linked to:
Igreja de Nossa Senhora da Graça
curtain walls ⓘ entrance gate ⓘ sea cliffs ⓘ wind compass ⓘ |
| hasUse |
cultural interpretation center
ⓘ
military defense ⓘ tourism ⓘ |
| heritageDesignation |
Monument of Public Interest (Portugal)
ⓘ
Property of Public Interest (Portugal) ⓘ |
| inception | 15th century ⓘ |
| locatedIn |
Algarve
ⓘ
Sagres ⓘ Vila do Bispo ⓘ |
| locatedInTimeZone | Western European Time ⓘ |
| locatedNear |
Cape St. Vincent
ⓘ
Sagres town ⓘ
linked to:
Sagres
|
| locatedOn |
Atlantic Ocean coast
ⓘ
Sagres Promontory ⓘ
linked to:
Sagres Peninsula
|
| materialUsed | stone ⓘ |
| openToPublic | yes ⓘ |
| operator | Direção-Geral do Património Cultural ⓘ |
| originallyBuiltBy |
Prince Henry the Navigator
ⓘ
linked to:
Henry the Navigator
|
| ownedBy | Portuguese state ⓘ |
| partOf | Promontory of Sagres cultural landscape ⓘ |
| reconstructedIn |
16th century
ⓘ
18th century ⓘ |
| significantEvent |
1587 attack by Francis Drake
ⓘ
Age of Discoveries ⓘ
linked to:
Age of Exploration
|
| viewOver |
Atlantic Ocean
ⓘ
cliffs of Sagres Promontory ⓘ
linked to:
Sagres Peninsula
|
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: Fortress of Sagres Description of subject: The Fortress of Sagres is a historic coastal stronghold in Portugal’s Algarve region, long associated with maritime exploration and the legacy of Prince Henry the Navigator.
Referenced by (7)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Fortress of Sagres
linked to: Fortress of Sagres
linked to: Fortress of Sagres
linked to: Fortress of Sagres
linked to: Fortress of Sagres
linked to: Fortress of Sagres