In the wake of the EU’s greatest enlargement, this book explores the adaptation of the constitutions of Central and Eastern Europe for membership in the European Union. In response to the painful past, these new constitutions were notably closed to the transfer of powers to international organisations, and accorded a prominent status to sovereignty and independence. A little more than a decade later, the process of amending these provisions in view of the transfer of sovereign powers to a supranational organisation has proved a sensitive and controversial exercise