The real Tower of Pisa

The famed Leaning Tower of Pisa has never really been straight due to its sandy soil conditions and an underlying layer of marine clay.
Not long after work began in 1173, the tower started inclining.
The problem was compounded by the fact that the citizens of Pisa stopped work several times to engage in wars with Florence

Why it tilts

The hotel sits on a raft foundation with thick marine clay below the soil. A certain amount of settlement can be expected in buildings founded on footings or rafting in such soil condition. The differential settlement causes the building to tilt. Guests certainly do not have to worry about the leaning condition of the hotel, as the building is proved to be definitely safe in multiple tests conducted by specialist.