Simmenthal
E1022580
case of the Court of Justice of the European Communities
judgment of the European Court of Justice
landmark court decision
Simmenthal is a landmark decision of the European Court of Justice that reinforced the supremacy and direct effect of European Community law over conflicting national legislation.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Simmenthal canonical | 1 |
| Simmenthal II | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T13133708 — 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: Simmenthal Context triple: [Van Gend en Loos, citedBy, Simmenthal]
-
A.
Biesenthal
Biesenthal is a small town in the Barnim district of Brandenburg, Germany, known for its surrounding lakes, forests, and location within the Barnim Nature Park.
-
B.
Marienthal
Marienthal is a district of the German city of Zwickau, known primarily as a residential area with local amenities and green spaces.
-
C.
Kurzberg
Kurzberg is a surname of German origin, likely derived from geographic or topographic roots.
-
D.
Machtolsheim
Machtolsheim is a village in the Alb-Donau district of Baden-Württemberg, Germany, that forms part of the town of Laichingen.
-
E.
Bentov
Bentov is a Hebrew surname most notably associated with Mordechai Bentov, an Israeli politician and signatory of the Israeli Declaration of Independence.
- 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: Simmenthal Target entity description: Simmenthal is a landmark decision of the European Court of Justice that reinforced the supremacy and direct effect of European Community law over conflicting national legislation.
-
A.
Biesenthal
Biesenthal is a small town in the Barnim district of Brandenburg, Germany, known for its surrounding lakes, forests, and location within the Barnim Nature Park.
-
B.
Marienthal
Marienthal is a district of the German city of Zwickau, known primarily as a residential area with local amenities and green spaces.
-
C.
Kurzberg
Kurzberg is a surname of German origin, likely derived from geographic or topographic roots.
-
D.
Machtolsheim
Machtolsheim is a village in the Alb-Donau district of Baden-Württemberg, Germany, that forms part of the town of Laichingen.
-
E.
Bentov
Bentov is a Hebrew surname most notably associated with Mordechai Bentov, an Israeli politician and signatory of the Israeli Declaration of Independence.
- F. None of above. chosen
Statements (42)
| Predicate | Object |
|---|---|
| instanceOf |
case of the Court of Justice of the European Communities
ⓘ
judgment of the European Court of Justice ⓘ landmark court decision ⓘ |
| areaOfLaw |
EU constitutional law
NERFINISHED
ⓘ
direct effect of EU law ⓘ supremacy of EU law ⓘ |
| authorityLevel | leading authority on primacy of EU law ⓘ |
| caseNumber | Case 106/77 NERFINISHED ⓘ |
| citationStyle | Case 106/77, Amministrazione delle Finanze dello Stato v Simmenthal SpA NERFINISHED ⓘ |
| citedAsPrecedentIn |
cases on direct effect of EU law
ⓘ
cases on primacy of EU law ⓘ |
| countryOfOrigin | Italy ⓘ |
| court | European Court of Justice NERFINISHED ⓘ |
| decisionDate | 1978-03-09 ⓘ |
| educationUse | commonly taught in EU law courses ⓘ |
| effectOnJudiciaries | strengthens role of ordinary national courts in enforcing EU law ⓘ |
| effectOnNationalLaw | requires immediate disapplication of incompatible national provisions ⓘ |
| fullName | Amministrazione delle Finanze dello Stato v Simmenthal SpA NERFINISHED ⓘ |
| holding |
national courts do not need to await the prior setting aside of national law by a constitutional court or legislature
ⓘ
national courts must disapply conflicting national law on their own authority ⓘ national courts must give full effect to directly effective provisions of Community law ⓘ national courts must set aside any conflicting national legislation ⓘ |
| impact | clarified obligations of national courts when faced with conflicting national and Community law ⓘ |
| involvedInstitution | Italian national courts NERFINISHED ⓘ |
| jurisdiction | Member State courts of the European Communities ⓘ |
| languageOfProceedings | Italian ⓘ |
| legalOrder |
European Community law
NERFINISHED
ⓘ
European Union law NERFINISHED ⓘ |
| legalSystem | European Communities legal system NERFINISHED ⓘ |
| party |
Amministrazione delle Finanze dello Stato
NERFINISHED
ⓘ
Simmenthal SpA NERFINISHED ⓘ |
| principleAffirmed |
direct effect of Community law provisions
ⓘ
duty of national courts to protect rights conferred by Community law ⓘ supremacy of Community law over conflicting national law ⓘ |
| region | Europe ⓘ |
| reinforcesCaseLaw |
Costa v ENEL
NERFINISHED
ⓘ
Internationale Handelsgesellschaft NERFINISHED ⓘ |
| relatedConcept |
direct applicability
ⓘ
disapplication of national law ⓘ primacy of EU law ⓘ |
| subjectMatter | conflict between Italian legislation and directly effective Community law provisions ⓘ |
| yearDecided | 1978 ⓘ |
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: Simmenthal Description of subject: Simmenthal is a landmark decision of the European Court of Justice that reinforced the supremacy and direct effect of European Community law over conflicting national legislation.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Simmenthal II