The Leaning Tower is the bell tower of the cathedral and is located in the Miracle Square of Pisa. The monument is the symbol of the city and one of the symbols of Italy.
It is a tall bell tower about 56 meters above ground and it was built between the twelfth and fourteenth century. Its slope is due to subsidence of the underlying soil has already occurred in the early stages of construction.
The construction: The first phase of the work was interrupted in the middle of the third floor. In an attempt to straighten the tower, the three planes added tend to sag in the opposite direction to the slope. The bell tower was completed in the mid of the next century, adding the belfry.
Restorations: Since its construction the inclination is increased. In the last decades of the twentieth century, the tilt had undergone a marked increase, so that the danger of the collapse had made concrete. Twenty years later, April 22, 2011 were completed the restoration work both inside and outside.