Unknown Facts and History about Leaning Tower of Pisa

Due to Collapsed of Civic Tower of Pavia in 1989, the work of restoration was sped up for the Leaning Tower of Pisa. The risk of collapse was seen to be too much of a danger to the public and it was decided to make the leaning tower of Pisa more stronger and stable by removing dirt from the ground and fill it with mortar and cement. In 1990 before restoration work, Pisa Tower leaned as much as 5.5 degrees and it is thought that the restoration will keep the Leaning Tower of Pisa stand for the next 300 years.