The Court of Justice of the European Union is one of the institutions of the Union. Praised by some as the relentless and steady motor of European integration and attacked by others as an example of a clearly biased institution, more ink has perhaps been spilled over the years on discussing the (de)merits of the Court of Justice than any other Union institution. In face of such considerable literature coming from legal, political science, sociological, and more recently also historical quarters, this chapter cannot but scratch the surface of the vast topic by providing a concise introduction into selected institutional themes in a legal1 and, where possible, diachronic perspective: the structure of the Union courts located in Luxembourg; basic information about the type of judicial business the Court of Justice carries out; the composition of the Court of Justice, including the recent changes made to the way in which judges and advocates-general are selected; the often discussed style and structure of the judgments; and, finally, the even more frequently discussed and recurring question of the legitimacy of the Court of Justice
