The population of Djibouti was growing rapidly, from officially about 17,000 inhabitants in 1947. In 1949, the plan of Djibouti consisted of four main features: a hierarchical system of streets laid out in a grid, large blocks consisting of small-scale domestic dwellings, the organization of these blocks around central open spaces, and the concentration of cultural institutions to form a civic center. It then became the headquarters of the succeeding French Territory of the Afars and Issas.