Tower leaning tower of Pisa, a marble that special, high 54 meters (feet) with 181 8 layers, each pole carved marble that I had a splendid support. Can build on the 1717 (AD 1174) to complete the 1893 (AD1350) journey up to 176 years. The structure is built in the world, a wonderful time while another is when start create 4-5. This tower began to tilt. But not collapse, because the force center of gravity.When completed, the top of the tower leaning away from the vertical base to 4 14 meters (feet). This allows the Galileo tower leaning and the scientists, the Italian celebrities of the world. Experiment on the velocity of cool objects that fell from a height.
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