La europeización de las constituciones nacionales en función de la constitucionalización de la Unión Europea

This paper aims to highlight the trends related to the formulation of accession and integration clauses to the European Union in the constitutions of Member States. To this end, after conducting a synchronous analysis, taking into account the European Union's enlargement process, we focus on two paradigmatic cases. On the one hand, Luxembourg, whose 1868 constitution, reformed in 2023, now incorporates an unprecedented European clause. On the other hand, Italy, where attempts to make less ambiguous the norm on which European integration is based have failed, and instead, an interpretative custom has developed. This analysis aims to understand the potential advantages of the Europeanisation of national constitutions, in parallel with the process of coonstitutionalization of the European Union, and to understand whether this contributes to the formation of a euro-national constitutional identity.