4 December 2012 - invited by the President of the Court of Justice of the European Union Mr Vassilios Skouris, Professor Jasna Omejec, President of the Croatian Constitutional Court attended a ceremony marking the 60th anniversary of the Court of Justice held in Luxemburg on 3 and 4 December 2012. The ceremony entailed the conference entitled "60 years of cooperation between the Court of Justice and National Courts: achievements and prospects" and the formal sitting which took place in the presence of their Royal Highnesses the Grand Duke and the Grand Duchess of Luxembourg, representatives of the Luxembourg authorities, the diplomatic corps, presidents of international courts, presidents of the Constitutional and Supreme Courts of the Member States and Croatia, former Members of the Court of Justice of the European Union and many other dignitaries.