Leaning Tower of Pisa!
History of the tower
The leaning tower of Pisa is a very old tower the construction begun in august 1173 and the tower is 655 years of age. That's pretty old. The tower was put on hold once they reached the fourth level then was resumed a century later (100 years). When they started construction up again they noticed a slight tilt to the north. The towers purpose was to house the bells of the cathedral of the Piazza dei Miracoli.
Why the Leaning tower of Pisa failed
Why does the leaning tower of Pisa lean you ask. Well the masons (builders) built the tower on soft ground so when they put the construction on hold for 100 years (century) the tower tilted north then northeast then finally south. The lean became worse as the construction went on for several decades. Between 1990 and 2001 it was stabilized and then partially fixed.
Some people have there own perspective...
Diagram of Pisa
Here's a diagram of the tower!
Bonnano Pisano begun the construction of the tower.
-The tower is the third oldest structure in Pisa's Cathedral square
-The height of the tower is 183.27 feet on the low side and 185.93 feet on the high side, and it's weight is estimated at 14,500 metric tons
-It took 199 years to build the tower