This work offers a Spanish perspective on contemporary practice in international law and European Community law by genuine practitioners such as registrars, judges and magistrates serving on national and international courts, as well as advocates practicing in these courts, senior international officials, government advisers and academics. In five parts this book deals with the practice in international courts; practice in international organizations; the European Community practice and; Spanish practice in matters of public and private international law. The last part contains an article on evidence in international practice and a general overview for further research. The book offers a very useful insight in matters otherwise available in Spanish, such as the applications against Spain lodged with the European Court of Human Rights, a comparison between the Spanish Constitutional Court and the Court of Justice of the European Communities, public international law before Spanish domestic courts and the Spanish practice on investment treaties.