Altena Castle
E387261
Altena Castle is a medieval hilltop fortress in Altena, Germany, renowned as one of the earliest youth hostel sites and a well-preserved example of regional castle architecture.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Altena Castle canonical | 2 |
| Burg Altena | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T3774727 — 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: Altena Castle Context triple: [County of Mark, hasCastle, Altena Castle]
-
A.
Dankwarderode Castle
Dankwarderode Castle is a medieval fortress located in the historic center of Brunswick, Germany, notable for its Romanesque architecture and role in the region’s ducal history.
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B.
Bentheim Castle
Bentheim Castle is a historic hilltop fortress in Bad Bentheim, Germany, known as one of the largest and best-preserved castles in northwestern Germany.
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C.
Betzdorf Castle
Betzdorf Castle is a historic Luxembourgish castle notable as the birthplace of Henri, Grand Duke of Luxembourg.
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D.
Hellenstein Castle
Hellenstein Castle is a historic hilltop fortress overlooking Heidenheim an der Brenz in southern Germany, known for its medieval architecture and panoramic views.
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E.
Dillenburg Castle
Dillenburg Castle was a significant Renaissance-era stronghold in Dillenburg, Germany, historically associated with the House of Nassau and the early life of William the Silent.
- 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: Altena Castle Target entity description: Altena Castle is a medieval hilltop fortress in Altena, Germany, renowned as one of the earliest youth hostel sites and a well-preserved example of regional castle architecture.
-
A.
Dankwarderode Castle
Dankwarderode Castle is a medieval fortress located in the historic center of Brunswick, Germany, notable for its Romanesque architecture and role in the region’s ducal history.
-
B.
Bentheim Castle
Bentheim Castle is a historic hilltop fortress in Bad Bentheim, Germany, known as one of the largest and best-preserved castles in northwestern Germany.
-
C.
Betzdorf Castle
Betzdorf Castle is a historic Luxembourgish castle notable as the birthplace of Henri, Grand Duke of Luxembourg.
-
D.
Hellenstein Castle
Hellenstein Castle is a historic hilltop fortress overlooking Heidenheim an der Brenz in southern Germany, known for its medieval architecture and panoramic views.
-
E.
Dillenburg Castle
Dillenburg Castle was a significant Renaissance-era stronghold in Dillenburg, Germany, historically associated with the House of Nassau and the early life of William the Silent.
- F. None of above. chosen
Statements (44)
| Predicate | Object |
|---|---|
| instanceOf |
fortress
ⓘ
hill castle ⓘ medieval castle ⓘ tourist attraction ⓘ |
| architecturalStyle | medieval castle architecture ⓘ |
| category |
Castles in North Rhine-Westphalia
ⓘ
Hill castles in Germany ⓘ Museums in North Rhine-Westphalia ⓘ Youth hostel history ⓘ |
| country | Germany ⓘ |
| elevation | hill above the Lenne valley ⓘ |
| hasPart |
castle keep
ⓘ
curtain walls ⓘ gatehouse ⓘ inner courtyard ⓘ |
| hasView | Lenne River valley ⓘ |
| hasVisitorFacility |
exhibition rooms
ⓘ
guided tours ⓘ youth hostel accommodation ⓘ |
| heritageDesignation | cultural heritage monument in North Rhine-Westphalia ⓘ |
| inception | early 12th century ⓘ |
| knownFor |
one of the earliest youth hostel sites
ⓘ
well-preserved medieval castle architecture ⓘ |
| locatedIn |
Altena
ⓘ
Germany ⓘ Märkischer Kreis ⓘ North Rhine-Westphalia ⓘ |
| locatedInTimeZone | Central European Time ⓘ |
| locatedOn | hilltop above the Lenne River ⓘ |
| materialUsed | stone ⓘ |
| openToPublic | yes ⓘ |
| operatedAs |
museum of regional history
ⓘ
tourist museum ⓘ |
| overlooks |
town of Altena
ⓘ
linked to:
Altena
|
| partOf | regional network of castles in the Sauerland area ⓘ |
| preservationStatus | well-preserved ⓘ |
| significance |
historically important for the youth hostel movement
ⓘ
important example of regional castle architecture ⓘ |
| significantEvent | establishment of one of the first permanent youth hostels ⓘ |
| surroundedBy | forested hills ⓘ |
| touristAttraction | regional tourism in North Rhine-Westphalia ⓘ |
| usedFor |
defensive purposes in the Middle Ages
ⓘ
museum ⓘ youth hostel ⓘ |
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: Altena Castle Description of subject: Altena Castle is a medieval hilltop fortress in Altena, Germany, renowned as one of the earliest youth hostel sites and a well-preserved example of regional castle architecture.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Altena Castle
linked to: Altena Castle