Peering into the Haussmann's Plan and the urban intervention in París, between the years 1853-1869, put us in front of many social, political and economic reactions occurred in the setting of a city that was submitted to drastic urban interventions to transform definitely their physiognomy.From the order of the Emperor Napoleon III, París was left in the hands of a man absolutely committed to innovative and radical changes towards a fluid, clean and enjoyable urban structure, more enjoyable for the citizen.This locomotive of urban planning expounded ideals that involved razing wielded strong focal points in the city, that implied a dramatic traffic shift and the rapid construction of housing and the deployment of public and complementary services that would give París a different image that the former medieval city: boulevards, squares, parks, new heights, reference points in the city, and strategic positioning for security forces appear strongly in the middle of rebellions and upheavals.A new París born then, the city that we know now and has been a model of inspiration for artists, philosophers, scholars, politicians and people in general concerned about the urban development of their hometowns.All these transformations of the City of Lights infected several Chileans, among them Benjamin Vicuña Mackenna, an eyewitness of the new urban trend that would open a period characterized by an urban interest in Santiago de Chile, from the late nineteenth century until the third decade of the twentieth century, in which were argued, discussed and put on the table several plan, somehow influenced by Haussmann's urban transformation of París.This article collects succinctly the main sections of this process in order to understand the origin of a pandemic of urban transformation that spread to Santiago de Chile and other cities on the planet.