This collective volume examines how EU citizenship reconstructs in unexpected ways what citizenship as a status means and stands for. EU citizenship can neither be accurately described as a citizenship status similar to national citizenship, nor as an immigration one. The book examines the tension at the heart of attempts to grasp the nature of EU citizenship as supranational status in relation to family reunification, social rights and expulsion. It shows that while events such as Brexit stress the importance of EU citizenship, the construction of supranational citizenship along the axis of non-discrimination and equality remains a work in progress that requires the efforts of all actors involved – institutions, implementing authorities, courts and citizens.