The course aims at providing an introduction to core elements and key-issues of European Law, both in its institutional and substantive dimensions. It will present the historical evolution of the European construction before discussing what the European Union currently is (its legal nature) and what it can do (the question of its competences). The course will then familiarise students with issues such as European governance, the adoption of European legislation and enforcement mechanisms. It will present the main implications of the two structural principles of the European legal order, i.e. primacy and direct effect and will examine the two pillars of European constitutionalism, i.e. protection of fundamental rights and citizenship of the Union Finally, the course will focus on the workings of the European internal market as an area without frontiers in which the free movement of persons, goods, services and capital is ensured. The course will enable students to understand the context and implications of European law as well as some of the most significant case law of the Court of Justice of the European Union. It will include the major challenges the European Union has been facing in the recent years: Brexit, the Pandemic, the Rule of Law crisis in Poland and Hungary as well as the war in Ukraine.