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Leaning Tower of Pisa

Towers and Skyscrapers

The Leaning Tower of Pisa, or simply the Tower of Pisa, is the freestanding bell tower, or campanile, of Pisa Cathedral in Italy, known for its nearly four degree lean caused by an unstable foundation. It is one of three structures in Pisa's Cathedral Square, alongside the cathedral and the Pisa Baptistry, and it has become one of the most visited tourist attractions in the world and an architectural icon of Italy, receiving over five million visitors each year.

Facts
Year Created
1372 1
Construction spanned 1173 to 1372 across three phases interrupted by war; 1372 marks completion
Location
Pisa, Italy 1
Architectural Style
Romanesque 1
Structural System
Circular arcade design with engaged columns; the upper floors were built intentionally curved to compensate for the tilt 1
Primary Material
White marble 1
Building Type
Bell tower (campanile) 1
Commissioned By
Opera della Primaziale Pisana (the cathedral works authority) 1
Construction
from 1173 1
Height (metres)
55.86 1
Storey Count
8 1
UNESCO Inscription Year
1987 1
Inscribed as part of the Piazza del Duomo
Current Use
Bell tower for Pisa Cathedral and a major tourist attraction 1
Visitor Access
Reopened to the public on 15 December 2001; visitors climb 296 steps to the top 1
Classification
Genre
Architecture 1
Connections

In Form

Freestanding Romanesque bell tower.

In Movement

A celebrated example of Pisan Romanesque architecture.

In the Other Atlases
Sources
1. Leaning Tower of Pisa (Wikipedia)
Wikipedia
  • Infobox, architectural style field
  • Infobox, building type field
  • Infobox, location field
  • Construction section
    On 9 August 1173, the foundations of the tower were laid.
  • Technical information section
    Height from the ground floor: 55.863 m (183 ft 3+5/16 in)
  • Infobox, floor count field
  • Infobox, current use field
  • Infobox, commissioned by field
  • Infobox, UNESCO field
  • Infobox, visitor access field
  • Infobox, completion field
  • Genre reference
    The Leaning Tower of Pisa, or simply the Tower of Pisa, is the freestanding bell tower, or campanile, of Pisa Cathedral in Italy, known for its nearly four degree lean caused by an unstable foundation.
View the Source
Frequently Asked Questions

Why does the Leaning Tower of Pisa lean and did the builders try to correct it?

An unstable foundation caused the lean, and the upper floors were built curved to compensate.

The tower leans because it stands on an unstable foundation. Its foundations were laid on 9 August 1173, and the lean of nearly four degrees followed from the ground beneath it. The builders did respond while building: the upper floors were built intentionally curved to compensate for the tilt.
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