This collection of articles follows the international conference, which was held at the Institute of Europe on 29 March 2017. The first volume is devoted to the history of the EEC-EU, the current situation and possible scenarios of EU development in light of Brexit. The authors analyze global challenges, which the EU has faced in recent years: the consequences of the world economic crisis, European identity crisis, migrants’ inflow, strategic partnership with the new U.S. administration. Special attention is paid to the founding countries, above all, the Franco-German tandem: the authors reveal not only the historical contradictions that France and Germany had to overcome, but also the new problems of leadership due to the current crisis in the EU. The second part focuses upon the countries that joined the European project at a later date, candidate countries and those who still aspire to join to the European Union.