Modern hygienic urbanism originated in the airy boulevards, public parks, and sewer system that transformed the Parisian cityscape in the mid-nineteenth century. Sun-Young Park reveals how anxieties about health and social order, which manifested in emerging ideals of the body, created a uniquely spatial and urban experience of modernity in the postrevolutionary capital, one profoundly impacted by hygiene, mobility, productivity, leisure, spectacle, and technology.