WhAt interesting fact do you know about the LEANING TOWER OF PISA?

I'm doing a report on the tower of pisa.

My focus is on the soils under the tower, but i'll take any facts you wanna cough up. Sources are much appriciated.

Wikipedia doesn't cut it. By a_guy_fro...James Burland was the engineer who was in charge of stabalizing the structure.

it will never fall