This book presents a socio-legal enquiry into the civic marginalisation of Roma in Europe. Instead of looking only at Roma's position as migrants, an ethnic minority or a socio-economically disadvantage group, it considers them as European citizens, questioning why they are typically used to describe exceptionalities of citizenship in developed liberal democracies rather than as evidence for how problematic the conceptualisation of citizenship is at its core. Developing novel theoretical concepts, the book investigates a variety of topics including migration and free movement, statelessness and school segregation. It argues that while Roma are unique as a minority, the treatment that marginalises them is not. This is demonstrated by comparing their position to that of other marginalised minorities around the globe.