The Good Friday Agreement signed in Belfast in 1998, but still in a process of development, is one of a number of peace agreements emerging from apparently intractable conflicts, since the end of the cold war. This article focuses on a relatively unexamined aspect of the Agreement - the international relevance of its innovative provisions on equality of citizenship and internationalised governance. The Belfast Agreement both implicitly and explicitly deals with the problematic issue of citizenship in a state which is highly contested at the constitutional level. Its development of an equality agenda and dynamic cross-border institutions of governance in a situation where ultimate sovereignty and allegiance remains contested is a departure from current international norms. The peace process around the Agreement also reflects a significantly increased international involvement in the Northern Ireland conflict. External support and mediation was essential in brokering an Agreement and will inevitably be important in sustaining the new forms of citizenship which are promised in its provisions. Both in its processes and in the framework for citizenship and governance suggested by the Agreement, Northern Ireland can provide a useful example to the increasing number of nationalist conflicts in the post cold war world. ...