Using the tools offered by law, and developing a multidisciplinary approach, the project aims to analyse the management of migrations within European borders in order to propose a renewed and enriched understanding of the notion of sovereignty. The examination of the norms adopted and the practices deployed by public authorities highlights the uses made of sovereignty when reduced to surveillance and selection in order to manage and control the entry of third country nationals. The assessment of these norms and practices with regard to the requirements of the law that they must respect and the rights that they must guarantee reveals in negative the ethical imperatives of sovereignty, when it is seized in its theoretical and legal intensity, as an authority that submits itself to the legal obligations of rights guarantee. The aim of the project is to reconsider the notion of sovereignty in order to account for its density and complexity, by studying it from its margins through the prism of ‘ethical internationalization’ (at the core of Mireille Delmas-Marty's reflections on Les forces imaginantes du droit). The project thus deploys an approach to law that is both pragmatic (by observing the actual implementation of legal norms) and ontological (by considering a reorganizing perspective of normative dynamics). The project offers an annual seminar: the first year program is available here (https://sites.google.com/site/marielaurebasiliengainche/activites/actualit%C3%A9s-du-projet-moebius/s%C3%A9minaire-moebius-2023-2024) and the second year program is available there (https://sites.google.com/site/marielaurebasiliengainche/activites/actualit%C3%A9s-du-projet-moebius/s%C3%A9minaire-moebius-2024-2025). All the information regarding the moebius research project can be find on a dedicated webpage: https://sites.google.com/site/marielaurebasiliengainche/activites/actualit%C3%A9s-du-projet-moebius.