Soft soil he defended the tower against earthquakes A group of geologists and engineers has established how the leaning tower of Pisa was able to move several large earthquakes since its construction, and it does not fall and not even sustain any damage. It turned out that such anomalous stability of the tower brought a dynamic interaction between a rigid tower structure and soft ground, which originally led to its inclination, according to the website of the University of Bristol. The leaning tower of Pisa was built almost two centuries — from 1173 at 1360. Even during construction due to errors when designing and irregular structure too soft ground, the tower began to lean. However, the construction was completed, after which the tower continued to slowly lean. Maximum roll construction reached 5.3 degrees, but now the Foundation of the tower was strengthened, and its slope is estimated to be about
