Leaning tower of Pisa is undoubtedly one of the main attractions of Pisa, a true symbol of the city. It is part of the architectural ensemble of the Cathedral of Santa Maria Assunta, located on the famous Field of Miracles (Campo dei Miracoli in Pisa. In 1986 the entire ensemble, including the tower, Cathedral, baptistery and cemetery Campo Santo, was included in the UNESCO world Cultural Heritage site by UNESCO.

The tower was completed in 1360: height of the structure is 55, 86 to 56, 7 meters high, the base diameter is 15, 54 meters. On the top of the Leaning tower, tilted at an angle almost in 4º, are 294 steps. Interestingly, the author of the project of the tower still remains unknown. Reliably established that the construction was carried out in two stages: it began in 1173 and lasted nearly two centuries, culminating, as mentioned above, in 1360. The first floor of the tower is made of white cake and is surrounded by pillars with classical capitals, which are based on blind arches. It was once believed that the famous tilting tower was conceived in the project, but today, experts are of the opinion that this architectural error: the combination of a small Foundation and soft ground was the reason that after the construction of the third floor tower leaned dangerously.

It is this inclination, and the original design of the tower, from the very beginning made her the object of universal attention. From school physics course everyone knows about the experiments of the great Galileo, who was dropped from the top of the leaning tower of Pisa objects with different mass. However, some historians believe that fact with legend, based on the fact that Galileo himself did not mention public experiments. Today we look at the architectural wonder millions of tourists come.

In order to save from collapse one of the main attractions of Italy, constantly taking various actions. So, crumbling columns of the first floor has been repeatedly replaced. Regularly works on strengthening of the Foundation. From 2002 to 2010, the tower was under restoration, in which the tilt angle was reduced from 5º30 to 3º54.