Abstract : Territory is the place where political authorities can affirm their public order and security concerns. Political power, in its modern forms, needs to be able to put its subjects under house arrest in order to control them; it is thus incapable of reconciling itself with any form of nomadism, which opposes its terms and functioning principles by definition. This thesis shows how the French central state organises itself against the mobility of a part of the gypsy populations that it categorizes as “gens du voyage” (“the travelling people”). The issue commands attention at two levels: on the one hand, the control of these populations concerns central authorities, but the problem of caravan parking must be addressed at the local level. This research examines the management of nomadism by the “Besson Law” of 5th July 2000, which is dedicated to the welcoming and accommodation of the gens du voyage and mandates the creation of welcoming areas (stopping places) for Gypsies in all towns over 5000 inhabitants. It will be argued that this law manages nomadism only partially control and welcoming issues do not constitute the entirety of the problem, but authorities have chosen to focus exclusively on these aspects. The first law to envisage welcoming the “gens du voyage”, the Besson legislation fuses together the double logic of control and welcoming in the form of welcoming areas, presented as a technical solution to these problems. In fact, the law provides for a quite classical form of regulation that balances the local and the national levels: local authorities are charged with implementing the law, whereas the central state assures its correct functioning.