Why Is the Pisa Tower Leaning?

By the time builders had finished the third of eight planned stories about five years later, the tower’s foundation had settled unevenly on the ground beneath it, a dense mixture of clay, sand and shells. As a result, the structure had begun to tilt visibly toward the south.

Why Is the Pisa Tower Leaning?

The Pisa Tower is one of the most iconic landmarks in the world, known for its unique silhouette and timeless beauty. But few people know why it is learning. That’s right—the famous structure isn’t actually meant to be leaning, and it’s thanks to a combination of environmental factors and man-made errors that it has come to tilt over the centuries.

The Pisa Tower, or the Torre di Pisa in Italian, was built in 1173 as the bell tower of the Pisa Cathedral. It is approximately 183 feet tall and weighs about 14,500 tons. The tower was intended to be built in a hundred days, but construction eventually took almost 200 years and was paused several times due to wars or malaria outbreaks.

Before long, the tower started to lean just a few feet after its first three stories were constructed. With its unfinished construction, this was caused by an inadequate foundation and the soft land it was built on. The softness of the land meant the foundation wasn’t able to sufficiently balance the weight of the tower, leading to the white marble structure leaning to one side.

It is believed that the tilt began to get worse due to the actions of the construction workers.

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