The Great Fire of London in 1666 had profound effects on the city, leading to extensive destruction but also to significant urban renewal. The fire began in a bakery on Pudding Lane and rapidly spread, destroying thousands of homes, St. Paul's Cathedral, and many other landmarks. Although the disaster left a large part of the city in ruins, it prompted rebuilding efforts guided by new architectural standards and urban planning principles. The result was a more organized and fire-resistant London, with wider streets and brick buildings replacing wooden structures. This reconstruction became a turning point in the city's development and resilience.