In the middle of the nineteenth century, the centre of Paris was viewed as overcrowded, dark, dangerous, and unhealthy. In 1845, the French social reformer Victor Considerant wrote: "Paris is an immense workshop of putrefaction, where misery, pestilence and sickness work in concert, where sunlight and air rarely penetrate. Paris is a terrible place where plants shrivel and perish, and where, of seven small infants, four die during the course of the year." The street plan on the Île de la Cité and in the neighbourhood called the "quartier des Arcis", between the Louvre and the "Hôtel de Ville" (City Hall), had changed little since the Middle Ages. The population density in these neighbourhoods was extremely high, compared with the rest of Paris; in the neighbourhood of Champs-Élysées, population density was estimated at 5,380 per square kilometre (22 per acre); in the neighbourhoods of Arcis and Saint-Avoye, located in the present Third Arrondissement, there was one inhabitant for every three square metres (32 sq ft). In 1840, a doctor described one building in the Île de la Cité where a single 5-square-metre room (54 sq ft) on the fourth floor was occupied by twenty-three people, both adults and children. In these conditions, disease spread very quickly. Cholera epidemics ravaged the city in 1832 and 1848. In the epidemic of 1848, five percent of the inhabitants of these two neighbourhoods died.