Leaning Tower of Pisa

My favorite sight is the Leaning Tower of Pisa. This is one of the most famous buildings in the world. It is visited every year over 10 thousand tourists. It is a symbol of the city. In fact, the cathedral bell tower. Construction began in 1174 year, at the same time, the tower began to deviate from the vertical. despite the threat in 1350 added to the top floor, which were placed the bells. Its mass is estimated at 14 tons. Currently, the tower has a height of about 55 meters. And tilted from the vertical by about 5 meters.