The Leaning Tower of Pisa is the campanile, or freestanding bell tower, of the cathedral of the Italian city of Pisa, known worldwide for its unintended tilt.
It is situated behind Pisa's cathedral and is the third oldest structure in the city's Cathedral Square (Piazza del Duomo),
after the cathedral and the Pisa Baptistry. The tower's tilt began
during construction, caused by an inadequate foundation on ground too
soft on one side to properly support the structure's weight. The tilt
increased in the decades before the structure
