International audienceThis article is based on the results of a research project devoted to the notion of "PLU patrimonial", an expression which refers to the french local development plan (PLU) integrating heritage issues and policies. The research project aims to draw up an inventory of the way in which local authorities have defined the tools of identification and protection of heritage in the framework of the elaboration of their PLU. We have focused here on several municipalities of large French cities, for a comparative analysis of these PLUs, enriched by interviews and field analyses with the actors of their elaboration. This analysis shows that heritage is clearly one of the obligatory stake in a PLU, generally in connection with ot...