Website on the Europeanisation of National Constitutions


The website on the Europeanisation of national constitutions was launched in October 2007. It has been continuously updated during the lifetime of the project and was completed by the end of 2011. It is mastered by the the Spanish National Research Council (CSIC) in Madrid and offers a comprehensive overview of how national constitutions are adapting to the process of European integration.

The website provides detailed information and documentation on the ratification process of EU treaties by each member state, the parliamentary debates surrounding this issue at the national level as well as the judicial treatment that these treaties were given in the member states.

Information is provided on all member states, candidate countries and potential candidate countries, with extensive information on their national constitutions. For each country, the information is divided in four thematic areas: (1) constitutional provisions related to the EU; (2) parliamentary debates on the ratification of EU treaties; (3) case law related to EU treaties; and (4) selected bibliography. As for the candidate countries and potential candidate countries, the website contains information on constitutional provisions and bibliographies. In addition, there is a short introduction of each country’s Constitution with basic information on its date of adoption, number of articles, amendments, and whether it contains specific references to the EU.

1. Constitutional provisions

  • Information on specific provisions in each Constitution in four areas, concerning: the European Union; international treaties; constitutional reforms; and referendums.
  • A total of 380 references.
  • 19 countries contain specific references to the EU in their Constitutions, whereas 24 member states have provisions regarding referendums.
  • Links to English versions of national constitutions by each member state.

2. Parliamentary debates

  • Information on the debates in 25 of 27 national parliaments regarding the ratification of each EU treaty, offered mostly in their original languages due to the lack of translations into English. In the case of Bulgaria and Greece, it has been very difficult to obtain any information on the parliamentary debates, but this will be added if/when possible.
  • A total of 150 debates in national parliaments, reports from Constitutional Committees on the ratification of EU treaties and speeches from the ratification periods of EU treaties.

3. Case law

  • Documentation on national judicial decisions on EU treaties and EU legislation.
  • A total of 96 decisions of the different Constitutional Courts, Supreme Courts or the jurisdictional court which has the power to revise the constitutionality of the EU treaties.
  • Including recent decisions, such as: the Constitutional Court of Poland on the conformity of the provisions of the Treaty of Lisbon with the requirements set out in Article 90 of the Polish Constitution (2010); the decision of the Constitutional Court of Hungary on the Act of Promulgation of the Treaty of Lisbon (2010); the decision of the Supreme Court of Denmark on the Treaty of Lisbon (2011); the Ordinanza of the Italian Constitutional Court on referendums (2011); the decision of the Constitutional Court of Belgium on the European Arrest Warrant (2011.

4. Bibliography

  • A comprehensive selected bibliography with a total of 326 texts for the 34 countries.


In addition, the website offers links to EU documents and EU institutions, to the constitutional courts and national parliaments of each member state or (potential) candidate country, and to the related project: The European Union Constitution, which was developed as part of the FP5-funded CIDEL project (2003-2005), in many ways the forerunner to the RECON project.


The website constitutes an important part of RECON’s WP 2 – The Constitutionalisation of the EU, the Europeanisation of National Constitutions, and Constitutionalism Compared. It is a powerful research tool for analysing the impact of the Europeanisation of national constitutions on the reconstitution of democracy in Europe. It is also a useful tool for practitioners, policy makers, political actors, interest groups, informed readers, journalists, students and others interested in EU constitutionalism in general.


Go to the website