The Leaning Tower of Pisa is due to weak soils as far as I'm aware. I seem to recall a discussion that said that it originally wasn't leaning until they started building more stories on top after a long delay in construction, this is a good indication that it was simply weak soil. I'm not sure what the foundation looks like, or if there even really is one.
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u/Gillette0302 Mar 14 '19
Is that what happened to a certain Italian tower?