The enlargement of the European Union to embrace Central, Eastern and Southern Europe is usually analysed from political and economic points of view. The current process also has legal implications which this edited collection aims to explore. Written by scholars and officials from the enlarged EU, the contributions look at the conditions and modalities of accession and at the impact of enlargement on EU institutions and policies. This volume is a useful reference for anyone interested in enlargement as such but it also provides a valuable background to the current constitutional reform of the EU.