Haussmann's renovation of Paris
As crime and destitution worsened, Parisian authorities sought to reduce these areas. Gabriel Nicolas de la Reynie was tasked in 1667 with utilising the fledgling Prefecture of Police to curb the growth of crime in the areas. By 1750, a new tactic of improving health and social care became prominent over law enforcement, and as great areas of the slums were demolished they were taken over by fishmongers and blacksmiths. The last vestiges of the old "cours des miracles" were eliminated with the redevelopment of the Filles-Dieu site during the French Revolution and Haussmann's renovation of Paris in the 19th century."