Hadamar Euthanasia Centre
E840611
The Hadamar Euthanasia Centre was a Nazi killing facility in Germany where thousands of people with disabilities and mental illnesses were murdered under the regime’s so-called “euthanasia” program during World War II.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Aktion T4 program site | 1 |
| Hadamar Euthanasia Centre canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T10103166 — 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: Hadamar Euthanasia Centre Context triple: [Hadamar, historicalEventSite, Hadamar Euthanasia Centre]
-
A.
Hartheim killing center
The Hartheim killing center was a Nazi euthanasia and extermination facility in Austria where thousands of disabled people and later concentration camp prisoners were murdered in gas chambers during World War II.
-
B.
Sonnenstein killing center
The Sonnenstein killing center was a Nazi euthanasia and extermination facility in Pirna, Germany, where thousands of disabled and later concentration camp prisoners were murdered as part of the T4 and Aktion 14f13 programs.
-
C.
Bernburg killing center
The Bernburg killing center was a Nazi euthanasia and extermination facility in Germany where thousands of disabled people and concentration camp prisoners were murdered with gas during World War II.
-
D.
BergenBelsen
Bergen-Belsen was a Nazi concentration camp in Germany infamous for its horrific conditions, mass deaths from starvation and disease, and the liberation images that became emblematic of the Holocaust’s atrocities.
-
E.
Dachau
Dachau was one of Nazi Germany’s first and most infamous concentration camps, serving as a model for the camp system and a site of widespread persecution, forced labor, and mass murder during the Holocaust.
- 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: Hadamar Euthanasia Centre Target entity description: The Hadamar Euthanasia Centre was a Nazi killing facility in Germany where thousands of people with disabilities and mental illnesses were murdered under the regime’s so-called “euthanasia” program during World War II.
-
A.
Hartheim killing center
The Hartheim killing center was a Nazi euthanasia and extermination facility in Austria where thousands of disabled people and later concentration camp prisoners were murdered in gas chambers during World War II.
-
B.
Sonnenstein killing center
The Sonnenstein killing center was a Nazi euthanasia and extermination facility in Pirna, Germany, where thousands of disabled and later concentration camp prisoners were murdered as part of the T4 and Aktion 14f13 programs.
-
C.
Bernburg killing center
The Bernburg killing center was a Nazi euthanasia and extermination facility in Germany where thousands of disabled people and concentration camp prisoners were murdered with gas during World War II.
-
D.
BergenBelsen
Bergen-Belsen was a Nazi concentration camp in Germany infamous for its horrific conditions, mass deaths from starvation and disease, and the liberation images that became emblematic of the Holocaust’s atrocities.
-
E.
Dachau
Dachau was one of Nazi Germany’s first and most infamous concentration camps, serving as a model for the camp system and a site of widespread persecution, forced labor, and mass murder during the Holocaust.
- F. None of above. chosen
Statements (51)
| Predicate | Object |
|---|---|
| instanceOf |
Nazi euthanasia centre
ⓘ
killing facility ⓘ |
| commemorates | victims of Nazi euthanasia program ⓘ |
| convertedFrom | psychiatric hospital ⓘ |
| country | Nazi Germany ⓘ |
| endDate | 1945-03 ⓘ |
| hasFacility |
crematorium
ⓘ
gas chamber ⓘ psychiatric hospital buildings ⓘ |
| hasGermanName | Tötungsanstalt Hadamar NERFINISHED ⓘ |
| heritageDesignation | site of remembrance ⓘ |
| languageOfName | German ⓘ |
| legalAftermath | Hadamar Trial NERFINISHED ⓘ |
| locatedIn |
Germany
ⓘ
Hadamar NERFINISHED ⓘ Hesse ⓘ |
| memorialStatus |
memorial site
ⓘ
museum ⓘ |
| methodOfKilling |
carbon monoxide poisoning
ⓘ
gas chamber ⓘ lethal injection ⓘ overdose of medication ⓘ starvation ⓘ |
| notablePerpetrator |
Adolf Wahlmann
NERFINISHED
ⓘ
Heinrich Ruoff NERFINISHED ⓘ |
| operatedBy | Nazi regime NERFINISHED ⓘ |
| operationalPhase |
Aktion T4 phase 1941
NERFINISHED
ⓘ
post-T4 decentralized killing phase 1942–1945 ⓘ |
| partOf |
Aktion T4
NERFINISHED
ⓘ
Nazi euthanasia program NERFINISHED ⓘ |
| perpetratorGroup |
Nazi doctors
NERFINISHED
ⓘ
administrative staff ⓘ nurses ⓘ |
| relatedTo |
Holocaust history
ⓘ
Nazi crimes against disabled people ⓘ |
| startDate | 1941-01 ⓘ |
| subsequentTrials | German courts in Frankfurt ⓘ |
| trialYear | 1945 ⓘ |
| triedBy | U.S. military tribunal NERFINISHED ⓘ |
| usedFor |
forced euthanasia
ⓘ
mass murder ⓘ systematic killing of people with disabilities ⓘ systematic killing of people with mental illnesses ⓘ |
| victimCount |
approximately 15000
ⓘ
over 10000 ⓘ |
| victimGroup |
adult psychiatric patients
ⓘ
children with disabilities ⓘ forced laborers ⓘ foreign workers ⓘ people with intellectual disabilities ⓘ people with mental illnesses ⓘ |
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: Hadamar Euthanasia Centre Description of subject: The Hadamar Euthanasia Centre was a Nazi killing facility in Germany where thousands of people with disabilities and mental illnesses were murdered under the regime’s so-called “euthanasia” program during World War II.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Aktion T4 program site