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1372 BCE
Leaning tower of Pisa
Leaning tower of Pisa built in 1372. The height of the tower is about 55m, the weight is about 14t. There are eight floors and 296 stairs in a total. Nowadays, the tower became one of the famous traveling spots in the world. -
1360 BCE
Adjusting
Even the builders adjust the leaning of the tower, they couldn't fix all the issues. In order that people started to have third work period (1360-1372). However, since there were few issues on the tower, it was built as a not straight tower. -
1300 BCE
Land Subsidence 2
Since there was land subsidence occurring constantly, the tower is still leaning at the time. Even people were still able to fix the construction, they gave up and keep building in order to build the tower as fast as possible. -
1278 BCE
Land Subsidence
Since there were many times of land subsidence from first work period (1173-1178) to second work period (1272-1278), the tower was already leaning. The builders started to adjust the core of the tower in order to build the tower straight. -
1173 BCE
Start
Bonanno Pisano, an Italian sculptor, planned for building Leaning tower of Pisa for Duomo (One of the churches in Italy).