Leaning Tower of Pisa.

1 ANSWERS

1. Amit bang
   

   Building of Pisa's tower was begun in 1173; five years later, when it had gotten to the third floor, the tower — which had been set on a flimsy foundation in unstable soil — began to sink. Construction was stopped for nearly 100 years, and the bell chamber and its bells were finally installed in 1372. The tower continued to sink about 1.2 mm (1/20 in.) yearly, and on this date in 1964, the Italian government requested aid in preventing it from toppling. It was eventually closed to the public in 1990, stabilized and reopened a decade later, in 2001. In 2008, engineers stated that the tower had not moved for the first time in its history.

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