ABSTRACT
This contribution uses a recent pronouncement of the Court of Justice of the European Union (ECJ) in the case of Janko Rottmann (C-138/08 [2010] ECR I-0000) as a pretext to look at the likely development of the citizenship of the European Union (EU) in the near future and, particularly, at the main consequences of such development for the nationalities of the Member States, from which EU citizenship is derived.
