Centrality is in fashion. We must nevertheless be able to identify the meanings and the uses. It stands away from the town center or the secondary centers, marked by a functional role, by a genetic principle, at the origin of the city and its chromosomic heritage. In Paris, it is related to the political power of the State, as concentrated in the space of the city as the capital will become in the construction of the national territory. The historical expansion of this original centrality finally explains the compactness of the current metropolitan agglomeration beyond its internal polarizations, like the creation of Versailles in the 17th century reflects the west-east dissymmetry of economy and society. Contemporary malfunctions stem from...