150 Years of Urban Growth - After a century and a half of gradual urbanization, the number of French cities has increased by a factor of three, and that of urban residents by a factor of seven. Three French people out of four now live in a city and, among them, three out of five live in a city of over a hundred thousand inhabitants. This urbanization was not uniform when examined by region or city. Some urban units developed extensively, others declined noticeably. Most of them did not go through an even process of evolution. Hence, in the classification of cities according to size, the changes in rank were frequent and sometimes considerable. However, rather homogeneous evolution profiles can be distinguished, which are regionally well-de...