Fort Casimir
E595555
Fort Casimir was a 17th-century Dutch colonial fort on the Delaware River that later became the site of present-day New Castle, Delaware.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Fort Casimier | 1 |
| Fort Casimir canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T6473081 — 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: Fort Casimir Context triple: [New Castle, Delaware, originalName, Fort Casimir]
-
A.
Fort Crèvecœur
Fort Crèvecœur was a Dutch colonial fort on the Gold Coast in present-day Ghana, historically used as a trading post and military stronghold.
-
B.
Popton Fort
Popton Fort is a 19th-century coastal artillery fort in Pembrokeshire, Wales, built to defend the Milford Haven Waterway.
-
C.
Fort Targowski
Fort Targowski is an architectural studio known for co-designing the European Solidarity Centre in Gdańsk, Poland.
-
D.
Fort Margherita
Fort Margherita is a 19th-century riverside fortress in Kuching, Sarawak, built during the Brooke era and now serving as a historical landmark and museum.
-
E.
Fort Bokar
Fort Bokar is a prominent 15th-century stone fortress guarding the seaward entrance to Dubrovnik’s Old City walls in Croatia.
- 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: Fort Casimir Target entity description: Fort Casimir was a 17th-century Dutch colonial fort on the Delaware River that later became the site of present-day New Castle, Delaware.
-
A.
Fort Crèvecœur
Fort Crèvecœur was a Dutch colonial fort on the Gold Coast in present-day Ghana, historically used as a trading post and military stronghold.
-
B.
Popton Fort
Popton Fort is a 19th-century coastal artillery fort in Pembrokeshire, Wales, built to defend the Milford Haven Waterway.
-
C.
Fort Targowski
Fort Targowski is an architectural studio known for co-designing the European Solidarity Centre in Gdańsk, Poland.
-
D.
Fort Margherita
Fort Margherita is a 19th-century riverside fortress in Kuching, Sarawak, built during the Brooke era and now serving as a historical landmark and museum.
-
E.
Fort Bokar
Fort Bokar is a prominent 15th-century stone fortress guarding the seaward entrance to Dubrovnik’s Old City walls in Croatia.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
Dutch fort
ⓘ
colonial fort ⓘ military installation ⓘ |
| associatedWith |
Dutch colonization of North America
ⓘ
English takeover of the Delaware region ⓘ Swedish colonization of North America ⓘ |
| builtFor |
control of Delaware River trade
ⓘ
defense of Dutch claims on the Delaware River ⓘ |
| capturedBy |
New Sweden
ⓘ
Swedish colonial forces ⓘ |
| conflictContext |
Dutch–Swedish rivalry in North America
ⓘ
linked to:
Dutch conquest of New Sweden
|
| constructedBy | Dutch West India Company ⓘ |
| controlledBy |
Dutch West India Company
ⓘ
New Netherland authorities ⓘ
linked to:
New Netherland
|
| countryAtTimeOfConstruction | Dutch Republic ⓘ |
| currentPhysicalRemains | no standing fort structures ⓘ |
| demolishedOrObsolete | yes ⓘ |
| followedBy |
town of New Amstel
ⓘ
town of New Castle ⓘ |
| garrisonedBy |
Dutch soldiers
ⓘ
Swedish soldiers ⓘ |
| heritageStatus | recognized as an important early colonial site in Delaware history ⓘ |
| historicalSiteOf | early European settlement on the Delaware River ⓘ |
| laterName | New Amstel ⓘ |
| locatedIn | New Castle, Delaware ⓘ |
| locatedInPresentDay |
Delaware
ⓘ
New Castle County, Delaware ⓘ United States ⓘ
linked to:
United States of America
|
| locatedNear | mouth of the Christina River ⓘ |
| locatedOn | Delaware River ⓘ |
| namedAfter |
Ernst Casimir of Nassau-Dietz
ⓘ
linked to:
Ernest Casimir I of Nassau-Dietz
|
| opposedTo | New Sweden ⓘ |
| partOf |
Dutch colonial empire
ⓘ
New Netherland ⓘ |
| precededBy | earlier Dutch trading posts on the Delaware River ⓘ |
| predecessorOf | New Castle, Delaware ⓘ |
| presentDaySite | historic district of New Castle, Delaware ⓘ |
| recapturedBy |
Dutch forces
ⓘ
Petrus Stuyvesant ⓘ
linked to:
Peter Stuyvesant
|
| region | Delaware Valley ⓘ |
| strategicImportance |
control of access to the upper Delaware River
ⓘ
proximity to Swedish Fort Christina ⓘ |
| timePeriod | 17th century ⓘ |
| usedFor |
military defense
ⓘ
trade regulation ⓘ |
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: Fort Casimir Description of subject: Fort Casimir was a 17th-century Dutch colonial fort on the Delaware River that later became the site of present-day New Castle, Delaware.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject linked to:
Dutch settlement of Fort Casimir
linked to: Fort Casimir