With essays from the most important voices in the field, this is a seminal text on the influence of Marise Cremona on EU external relations law.How powerful are EU external relations? For a long time, the law in this field was seen merely as an adjunct to constitutional law and the law of internal markets. However, in the last 20 years it has become a key tenet of the European Union, as globalisation and cross-border challenges have taken hold. Few have done more to shape the field's evolution than Marise Cremona, and this collection pays tribute to her immense contribution. In addition to assessing it power, it explores the role both the EU institutions and indeed EU people across borders. This is a compelling exploration of a fascinating subject.