In today's lecture, we'll discuss the history of urban planning. One key figure is Baron Haussmann, who redesigned Paris in the 1850s. He created wide boulevards, not just for aesthetics, but to prevent easy barricading during revolts and to allow rapid troop movement. Interestingly, his plan also included a new sewage system and improved water supply, which significantly reduced disease outbreaks. However, his critics argued that his approach destroyed historic neighborhoods and displaced many working-class residents to the outskirts. This tension between modernization and social cost remains relevant in contemporary city planning.