Leaning Tower of Pisa

The Leaning Tower of Pisa is the freestanding bell tower of Pisa Cathedral, distinguished by a persistent tilt caused by uneven settlement. The Leaning Tower of Pisa's cylindrical exterior is surrounded by tiers of open arcades above a solid lower level. The Leaning Tower of Pisa forms part of a cathedral ensemble whose contrasting buildings share marble surfaces and Romanesque architectural details.