Kochenov's definitive collection examines the under-utilised potential of EU citizenship, proposing and defending its position as a systemic element of EU law endowed with foundational importance. Leading experts in EU constitutional law scrutinise the internal dynamics in the triad of EU citizenship, citizenship rights and the resulting vertical delimitation of powers in Europe, analysing the far-reaching constitutional implications. Linking the constitutional question of federalism and citizenship, the volume establishes an innovative new framework where these rights become agents and rationales of European integration and legal change, located beyond the context of the internal market and free movement. It maps the role of citizenship in this shifting landscape, outlining key options for a Europe of the future.