This work consists of interrelated essays by many past and present members of the European University Institute (EUI) Law Department. The contributors' essays address such issues as: the effects of integration upon certain national laws; the elaboration of EU law to provide a new framework for or replacement for national laws; the piecemeal development of specific legal strands of EU law and their intertwining with national or international laws; and the indirect and sometimes unintended consequences of European integration with regard to national, EU or international law.