This book charts the evolution of EU law (both internal market and institutional law) through the jurisprudence of one of its leading jurists. Few have as close an eye-witness view of the evolution of European Union law as judges at the ECJ. They not only observe, however, but actively work towards its development. This collection assesses the momentous contribution to European Union law made by Jose Luis da Cruz Vilaca. Taking those areas of law which were directly shaped by his judgments (institutional law/internal market/free movement of persons and judicial review), leading scholars assess his legacy. Through this prism, the story of EU law can be charted.