Leaning Tower of Pisa

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The Leaning Tower of Pisa (Italian: Torre pendente di Pisa) or simply The Tower of Pisa (La Torre di Pisa) is the campanile, or freestanding bell tower, of the cathedral of the Italian city of Pisa. It is situated behind the Cathedral and it is the third structure in Pisa's Campo dei Miracoli (field of Miracles).

Although intended to stand vertically, the tower began leaning to the southeast soon after the onset of construction in 1173 due to a poorly laid foundation and loose substrate that has allowed the foundation to shift.

The height of the tower is 55.86 m (183.27 ft) from the ground on the lowest side and 56.70 m (186.02 ft) on the highest side. The width of the walls at the base is 4.09 m (13.42 ft) and at the top 2.48 m (8.14 ft). Its weight is estimated at 14,500 tonnes. The tower has 294 steps. ^[1]

Contents 1 Construction 2 History 3 Technical information 4 In Popular Culture 5 Notes 6 References 7 See also 8 External links

Construction

The Tower of Pisa was a work of art, performed in three stages over a period of about 174 years. Construction of the first floor of the white marble campanile began on August 9, 1173, a period of military success and prosperity. This first floor is surrounded by pillars with classical capitals, leaning against blind arches. Today, it is still unscarred from centuries of weather and age.^{[citation needed]}

History

Galileo Galilei is said to have dropped two cannon balls of different masses from the tower to demonstrate that their descending speed was independent of their mass. Many parts of this story, though reported by Galileo's own student, are widely considered to be merely legendary. While Galileo probably did climb to the top of the tower and drop two items to further prove his already-proven theory, more than likely, the items were not two cannonballs.^{[citation needed]}

Benito Mussolini ordered that the tower be returned to a vertical position, so concrete was poured into its foundation. However, the result was that the tower actually sank further into the soil.^{[citation needed]}

During World War II, the Allies discovered that the Nazis were using it as an observation post. A humble U.S. Army sergeant was briefly entrusted with the fate of the tower. His decision not to call in an artillery strike saved the edifice.^[2]

On February 27, 1964, the government of Italy requested aid in preventing the tower from toppling. It was however considered important to retain the current tilt, due to the vital role that this element played in promoting the tourism industry of Pisa.^[3] A multinational task force of engineers, mathematicians and historians was assigned and met on the Azores islands to discuss stabilization methods. After over two decades of work on the subject, the tower was closed to the public in January 1990. While the tower was closed, the bells were removed to relieve some weight, and cables were cinched around the third level and anchored several hundred meters away. Apartments and houses in the path of the tower were vacated for safety. After a decade of corrective reconstruction and stabilization efforts, the tower was reopened to the public on December 15, 2001. It was found that the lean was increasing due to the stonework expanding and contracting each day due to the heat of sunlight. This was working in combination with the softer foundations on the lower side. Many methods were proposed to stabilize the tower, including the addition of 800 metric tons of lead counterweights to the raised end of the base.^{[citation needed]} The final solution to prevent the collapse of the tower was to slightly straighten the tower to a safer angle, by removing 38 m³ of soil from underneath the raised end. The tower has been declared stable for at least another 300 years.^{[citation needed]}

In 1987, the tower was declared as part of the Campo dei Miracoli UNESCO World Heritage Site along with neighbouring cathedral, baptistery and cemetery.^{[citation needed]}

Technical information

• Geographic coordinates: 43.7231° N 10.3964° ECoordinates: 43.7231° N 10.3964° E
• Elevation of Piazza dei Miracoli: about 2 metres (6 feet, DMS)
• Height: 55.863 metres (183 ft 3 in), 8 stories
• Outer diameter of base: 15.484 m
• Inner diameter of base: 7.368 m
• Angle of slant: 5.5 degrees^[4] or 4.5 m from the vertical^[5]
• Weight: 14,700 tonnes
• Thickness of walls at the base: 8 ft (2.4 m)
• Total number of bells: 7, tuned to musical scale, clockwise
  • 1st bell: L'assunta, cast in 1654 by Giovanni Pietro Orlandi, weight 3,620 kg (7,981 lb)
  • 2nd bell: il Crocifisso, cast in 1572 by Vincenzo Possenti, weight 2,462 kg (5,428 lb)
  • 3rd bell: San Ranieri, cast in 1719-1721 by Giovanni Andrea Moreni, weight 1,448 kg (3,192 lb)
  • 4th bell: La Terza (1st small one), cast in 1473, weight 300 kg (661 lb)by
  • 5th bell: La Pasquereccia, cast in 1262 by Lotteringo, weight 1,014 kg (2,235 lb)
  • 6th bell: il Vespruccio (2nd small one), cast in the 14th century and again in 1501 by Nicola di Jacopo, weight 1,000 kg (2,205 lb)
  • 7th bell: Del Pozzetto, cast in 1606, weight 652 kg (1,437 lb)
• Steps to bell tower: 294^[6]

In Popular Culture

• The movie Superman III features an evil Superman doing several "bad deeds" around the world - one of which is straightening the Leaning Tower of Pisa, played to comedic effect. The famous final scene of the film features Superman pushing the tower back to its normal inclination.
• In the Histeria! episode "The Wheel of History", Froggo is shown attempting to push the tower into its leaning position, unsuccessfully. He soon manages to accomplish the task with the help of Archimedes (played by Chit Chatterson) and his lever.
• In the Cartoon series Futurama the leaning tower is knocked straight by Fry and Bender and then knocked back again on a joy ride in the Planet Express Ship.
• In the Disney movie Sky High, the very beginning shows Will Stronghold's superhero mom getting "take out" pizza from Italy. In one shot of the comic strip, she is seen with a pizza box, flying past the Leaning Tower of Pisa.
• In the Bartimaeus Trilogy, the djinni Bartimaeus claims that he helped build the Tower of Pisa, but his advice to the archiects was ignored and that is the reason that it leans.
• On a Tool Time segment on Home Improvement, Tim Taylor shows a picture of the tower as an example of how men create and build masterpieces with tools. His assistant Al Borland then goes on to say that the tower is actually an example of a mistake by mankind.^{[citation needed]}
• In a flashback in an episode Rocko's Modern Life, it is shown an ancestor of Heffer was standing at a side of the tower, causing the tower to lean.
• In Disney's A Goofy Movie, Max's friend Bobby (Pauly Shore) makes a reference to the tower with Eazy Cheeze that he piled in his hand and says "look, it's the leaning tower of cheesa."
• In MTV's Viva La Bam, Bam visits the tower and his uncle, Don Vito, who calls it "The Leaning Tower of Pizza" and says there is a pizza shop at the bottom of the tower . He then says in a hysterical voice that the whole town was named after pizza.
• In the Disney movie the Return of Jafar, the Genie's song 'Nothing in the world' refers to the Leaning Tower of Pisa where, comically, the Genie is seen cycling into the tower, which falls on top of him.^{[citation needed]}
• In Janet Jackson's music video "Runaway", she appears at the top of the tower.

Notes

References

• Shrady, Nicholas (2003). Tilt: a skewed history of the Tower of Pisa. New York: Simon & Schuster. ISBN 0-7432-2926-6. 

See also

• Leaning tower, for a general description of the phenomenon.
• Round tower, for other types of round towers.
• Leaning Tower of Niles, a replica of the Tower of Pisa
• Torre delle Milizie, a tilting medieval tower in Rome
• Machang - another leaning tower
• The Greyfriars Tower - the remains of a Franciscan monestry in King's Lynn. It is also leaning and is consequently nicknamed 'The Leaning Tower of Lynn' in reference to the Leaning Tower of Pisa.

External links

• "Bird's Eye" View of Leaning Tower of Pisa
• Satellite view of Leaning Tower of Pisa
• Holiday Local Map Guide
• The Leaning Tower of Pisa Virtual reality movies
• The Official Site In both English and Italian
• How the process of inclination was stopped
• The Leaning Tower of Pisa - Map