A Parisian metropolis is emerging, albeit somewhat chaotically. This is demonstrated by the authors of this book that retraces the history of the governance of this city, caught between the state's desire to control the capital through strategic plans and organisation, and the establishment of horizontal cooperation that respects the traditional opposition between Paris and its suburbs. Over time, these two logics have both waned. Decentralisation has re-dealt the cards of power within the Ile-de-France region. Public policy in transport, police, and urban renewal have shifted the old lines of territorial structure and political opposition. The omnipotence of Paris, symbolically defended by the ring-road, has faded due to action by networks, institutions and even conflicts. Drawing on original research, this precise and well-documented analysis sheds light on the political and institutional dynamics on an unfinished process of metropolization.