Is there a reason why the Leaning Tower of Pisa tilted?

A. 1

It is said that the construction was carried out three times for about 200 years from 1173 to 1372.
After the first round of construction, we found that the soil of the ground was uneven and tilted.
In the second round, the construction was supplemented, but it continued to tilt.
Recently, the Italian government began renovation work in 1990 to modify the angle of inclination and carried out repairs over a period of 10 years.
So the angle of inclination stopped at 5.5°.
It was re-released to the public in June 2001.
But it limits the number of people who can go up to the tower for conservation.

Gentleman 9 years ago 0

OK

A. 2

It was tilted from the beginning
At first, he thought it was an architect's intention.
I found out that it was intended to be upright in the future.
We still don't know exactly who the architect is, so we don't know the original intention kk
Mussolini once attempted to stand upright in the early 20th century.
So I poured a huge amount of concrete, and it became more unstable as the ground sank.
In the 1990s, we tried to do a more complete restoration over a decade.
It is said that it stopped at a slightly tilted state like now.
The reason is that it is a famous tourist destination.
So it's going to last about 300 years.

Gentleman 9 years ago 0

OK

A. 3

The ground is alluvial soil and groundwater flows underneath, so the tower is tilted because the ground is unstable.
Simply put, you can say that the tower was built on the mud.

Gentleman 9 years ago 0

OK

A. 4

I recently restored a tower, and the method is unique.
The tower was tied up with a steel cable, and 800 tons of lead was hung on the opposite side of the tower's tilt, and the ground was dug.
They say they succeeded in building a tower with this.
Currently, the restoration has been completed to some extent, and it has been reopened to the public, which is similar to the shape of the Leaning Tower of Pisa in the early 19th century.

Gentleman 9 years ago 0

OK