The significant impact of the Great Chicago Fire in 1871 was profound, leading to extensive changes in urban planning, architecture, and fire safety regulations. The fire destroyed a large portion of Chicago, leaving thousands homeless and fundamentally reshaping the city’s landscape. It prompted a massive rebuilding effort that introduced modern skyscraper designs using steel and reinforced concrete, a shift that transformed urban architecture. Additionally, the catastrophe led to enhanced fire safety codes, including better building materials and fire prevention strategies, fundamentally changing how cities approached urban resilience and public safety for future generations.