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ICONIC: The Leaning Tower of Pisa is known worldwide for its unintended tilt
The iconic building that stands at 183.27ft in the Italian city of Pisa is known worldwide for its unintended tilt.
It was initially built straight, but began to lean in the 12th century when the foundation on the ground became soft on one side.
Now over 740 years later, many are confused as to how it remains upright following a number of earthquakes.
A team of 16 researchers from Bristol Universitys Civil Engineering department investigated the theory and can now reveal all.
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The tower has stayed standing for so long because of the dynamic soil-structure interaction (DSSI).
This means that the height and the structure of the tower against the soft soil causes vibration to the building.
These vibration changes would prevent any natural disasters affecting the Italian landmark.
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“The very same soil can be credited for helping it survive these seismic events”
Professor George Mylonakis
As it doesnt vibrate in the same way, it means it can survive without disruption to the ground beneath it.
Professor George Mylonakis, who was part of the study, said: “Ironically, the very same soil that caused the leaning instability and brought the Tower to the verge of collapse, can be credited for helping it survive these seismic events.”
The Leaning Tower of Pisa is one of the most popular sights in the region.
Over one million tourists visit the site every year, with the stability of the tower expected to last another 200 years.
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LEANING TOWER: It was initially built straight but began to tilt in the 12th century
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