Over the past few years, 'national constitutional identity' has become the new buzzword in European constitutionalism. Much has been written about the concept involving the Member States' national constitutional identities: it has been welcomed for (finally) accommodating constitutional particularities in EU law, demonized for potentially disintegrating the EU, and wielded as a 'sword' by certain constitutional courts. Scholars, judges, and advocates in general have rendered the concept currently so fashionable and, yet, so ambivalent, that an in-depth analysis is warranted to put some order...