The entry into force of the Lisbon Treaty has led to profound institutional and material changes regarding the decision-making system of the EU, in particular as regards how the EU acts vis-à-vis the outside world. This seminar wraps up a multi-annual research project led by SIEPS on the EU’s international role. It presents the findings of the overall changes that are a consequence of the Lisbon Treaty and the impact these changes have on several EU foreign policy areas: trade, European Neighbourhood Policy, and Common Foreign and Security Policy.