 To direct this task, he named a new prefect of the Seine department, Georges-Eugène Haussmann, and gave him extraordinary powers to rebuild the center of the city.He installed a large map of Paris in a central position in his office, and he and Haussmann planned the new Paris.The population of Paris had doubled since 1815, with neither an increase in its area nor a development of its structure of very narrow medieval streets and alleys.