Citizenship implies membership of a political community and is internally defined by rights, duties, participation, and identity. It has traditionally been subordinate to nationality, which defines the territorial limits of citizenship. In order to theorize forms of citizenship that go beyond the spatial domain of nationality, citizenship must be seen as multilayered, operating on the regional, national and supranational levels. European citizenship as postnational citizenship is compatible with other forms of citizenship and could become an important dimension to the integration of European society in the twenty first century. At the moment, however, the tendency is to define European citizenship in terms of, on the one hand, a formal and derivative citizenship based on rights and which is mostly supplementary to national citizenship and, on the other hand, a European supranationality defined by reference to an exclusivist conception of European cultural identity. This conception of European identity and citizenship neglects other possibilities which European integration offers.