Leaning tower of Pisa Located in the city of Pisa, Italy, is a white cylindrical tower made of marble, with all 8 55 m high building in 1174, when approximately 4-5 floors tilting tower to groundwater occurs away from the lines straight up and down 4 metres but did not crash down due to gravity at the center of gravity. This tower was built in 1951 to 1350 176 years old is considered a construction that takes the longest building in the world. Galileo end up experimenting with gravity at this tower. Currently, leaning tower of Pisa does not allow tourists to visit.
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