A continuous dialogue between courts as an integration and harmony way through the preliminary reference of the CJEU

Abstract: This paper with the help of the case law of the Court of Justice of the European Union tries to investigate some recent cases regarding the role of the preliminary reference through the national judge and that of the Union. A reference that also shows the role of the national constitutional courts that are oriented to assume their responsibilities through an appropriate but not necessarily binding and necessary reference. The dialogue between courts contributes for the Member States an important point of European constitutional harmony based on the principle of the primacy of the law of the Union as well as the principle of loyal cooperation.