Structure and History of the Leaning Tower of Pisa

The Leaning Tower of Pisa began leaning in 1178 due to inadequate foundations. Construction paused for nearly 100 years due to wars, allowing the ground to settle. Resumed in 1272, the tower was completed in 1372, leaning at 4 degrees. Over 600 years, the lean increased, prompting stabilization efforts in 1964. Engineers used lead weights and soil extraction to reduce the lean, ensuring stability for another 200 years.

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