This annual report highlights the main events that were undertaken in 2013 under the METRO (Institute for Transnational Legal Research, Maastricht University) umbrella. It therefore contains an overview of all meetings, publications and other noteworthy information. Publications of the METRO researchers are highlighted, but also the various activities mentioned above, more particularly publications within the Maastricht Journal of European and Comparative Law as well as within the Ius commune Europaeum book series and the Ius Commune casebooks for the common law of Europe. Also the ongoing and initiated research projects by METRO are mentioned in this annual report.