Alessandra Silveira, Director of CEDU, participated in the V International Colloquium Macrofilosófico entitled "Vigencia de la categorización physis-Nomos". The activity took place at the Philosophy Faculty of the Universitat de Barcelona in the past 24 and 25 November 2014. Alessandra Silveira joined the panel "A European nomos? Constitutionalizing Physis and Nomos" with a subordinate presentation on "Constitutional pluralism and European integration - interconstitutionality between physis and nomos".