Cathedral Square, Pisa, Tuscany

Leaning Tower of Pisa

Around 1370, the bell tower of Pisa is finally finished after two centuries, and it already leans, its marble tiers curving as builders fought the soft ground, beside the great cathedral and round baptistery on the green cathedral square.

Panoramic scene depicting Leaning Tower of Pisa (1370s), Cathedral Square, Pisa.
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Panoramic scene depicting Leaning Tower of Pisa (1370s), Cathedral Square, Pisa.
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Year
1370s
Where
Tuscany · IT
Era
Medieval
Coordinates
43.723, 10.397

The moment

Two hundred years to build a lean

The tower was begun in 1173 as the bell tower of Pisa's cathedral. It started to lean almost at once, while only a few storeys were up, because its foundations were too shallow for Pisa's soft, marshy subsoil.

Work then stopped for decades at a time, as Pisa fought its wars. That delay, by pure luck, let the ground settle and consolidate between stages, which probably saved the tower from toppling. The bell chamber was finally added in 1372, nearly two centuries after the first stone.

Built crooked, on purpose and not

As the tilt grew, the builders tried to compensate, making the upper floors slightly taller on the lower side.

The result is a tower that is not only leaning but gently banana-shaped. It stands as one of three buildings (with the striped-marble cathedral and the round baptistery) on the great cathedral square, together a high point of Pisan Romanesque architecture.

The accidental icon

Galileo, a son of Pisa, is said (probably as a legend) to have dropped weights from the tower around 1590 to study how things fall.

Over the centuries the lean slowly worsened, until by the late twentieth century the tower was close to collapse; a major engineering rescue in the 1990s and 2000s eased it back and stabilised it. The flaw became the fame: a builder's mistake is now one of the most recognised and most visited buildings on Earth.

Further reading

Tagged

  • pisa
  • italy
  • leaning-tower
  • campanile
  • romanesque
  • tuscany

Published

See also