Today's lecture is about the history of urban planning. One key figure is Baron Haussmann, who redesigned Paris in the 1850s. He widened streets to improve traffic flow and reduce disease, but his projects also displaced many working-class residents. Interestingly, his plan included strict building height limits and uniform facades, which gave Paris its distinctive look. However, critics argue that his approach prioritized aesthetics over social welfare, leading to long-term inequality. In contrast, modern planners often focus on community involvement and sustainable design, learning from past mistakes.