Leaning Tower of Pisa - 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 whole ensemble, including the tower, the Cathedral, Baptistery and Campo Santo cemetery was included in the list of World Cultural Heritage by UNESCO.

Construction of the tower was completed in 1360: the height of the structure is from 55, 86 to 56, 7 meters, diameter of the base is 15, 54 meters. At the top of the Leaning Tower, inclined at an angle of nearly 4º, lead 294 steps. Interestingly, the author of the tower is still unknown. It is well established that the construction was carried out in two stages: it began in 1173 and lasted almost two centuries, culminating, as mentioned above, in 1360. The first floor of the tower is made of white cupcakes surrounded by pillars with classical capitals, which are based on blind arches. It was once thought that the famous leaning tower was conceived in the draft, but now experts are of the opinion that this architectural error: the combination of a small foundation and soft soil is the reason that after the construction of the third floor of the tower leaned dangerously.

It is this inclination, as well as the original design of the tower, from the very beginning made it a subject of public scrutiny. From school physics course everyone knows about the experience of the great Galileo, who dropped from the top of the Leaning Tower objects with different masses. However, some historians believe this fact is a legend based on the fact that Galileo himself did not mention the public experiments. Today we look at the architectural wonder millions of tourists come.

In order to save it from collapse one of the main attractions of Italy, constantly taken various actions. So, crumbling columns of the first floor has been repeatedly replaced. Regularly works on strengthening the foundation. From 2002 to 2010, the tower is being restored as a result of which the angle of inclination has been reduced from 5º30' to 3º54'.