The Leaning Tower of Pisa is a freestanding bell tower located in the city of Pisa in Italy. Like its name suggest, it actually does lean to one side. The tower started to lean during construction because the foundation was built on soft ground that had difficulty supporting the weight. The lean became worse as construction continued for several decades. Between 1990 and 2001 it was stabilized and the lean was partially fixed.

It was originally built as a freestanding bell tower.