Brief introduction of the leaning tower of Pisa (be sure to be brief! ! ! )

The leaning tower of Pisa is one of the world-famous architectural wonders and tourist attractions. It is located in the church square of Pisa, an ancient city in western Italy. It is the bell tower in the comprehensive building of Pisa Cathedral and the most famous building in the complex. The leaning tower of Pisa was built in 1 174 and completed in 1350, all made of marble. At the beginning, the tower was erected, but when it was built on the third floor, because the foundation was not deep and the strength of the upper floor was low, the tower began to tilt and the project was suspended. Construction resumed after 1994, and a series of anti-tilt measures were strengthened. However, after the completion of the whole tower, the center of the tower top still deviates from the vertical center line. At present, the center point of the tower top has deviated from the vertical center line by 4.4 meters. The leaning tower of Pisa is more than 54 meters high and is divided into 8 floors, with 15 stone pillars on the bottom floor, 30 stone pillars on the upper floor and 12 stone pillars on the top floor. This tower has 300 stairs. The leaning tower of Pisa is a Roman architectural style. After more than 600 years of wind and rain, it stands tall and "leans down" and is famous all over the world. 1590, Italian physicist Galileo made a famous experiment of "two iron balls landing at the same time" on the tower, which overthrew the theory of Greek scholar Aristotle that objects with different weights landed at different speeds, and made the leaning tower of Pisa more famous all over the world.