Preliminary references by national constitutional courts are not an everyday occurrence in Union law. No surprise, therefore, that they attract considerable publicity and give rise to a significant amount of academic comment. However, the recent preliminary request of the German Federal Constitutional Court (GFCC) in Gauweiler constitutes undoubtedly the most important and historic preliminary reference made thus far by a constitutional court. This is not only because it is the very first preliminary request of this particular court, inaugurating potentially a whole new era in its institutional relationships with the Court of Justice and paving the way for other national constitutional courts to make more regular recourse to the preliminary reference procedure; but also because it relates to an issue of central importance for the process of European integration with far reaching economic and political repercussions.