The day of study showed, according to a local and regional approach and according to a specificity of some orders, that the members of a religious order were big property owners and active protagonists of the urban transformations in the modern period. Two complementary orientations were proposed : to be able to compare the holdings with other social groups and the possible exchanges but also to go towards a smaller spatial influence, that of the street with a history of the smells and the tones to encircle the insertion of the members of a religious order in a city. Between the pension and the mission, the orders did not know how to choose nevertheless always or make understand their specific objectives and they were finally particularly struck by the revolutionary decisions.