The Principality of Monaco has the particularity of having instituted a system of hierarchical national preference favoring Monegasques first, then individuals who share more or less close ties with the Principality, particularly in the fields of employment and housing. The objective of the principality is to maintain the national citizens in the territory given its attractiveness and the pressure on the cost of real estate that results. This article proposes to discuss this system of national preference which, from a conceptual point of view certainly influences the identity-building process of the different categories of individuals residing in Monaco, thus shaping the relations between the different groups present in the country.