Seven Wonders of the Middle Ages
Seven Wonders of the Middle Ages : Stonehenge
| Colosseum | Catacombs
of Kom el Shoqafa | Great
Wall of China | Porcelain
Tower of Nanjing | Hagia
Sophia | Leaning
Tower of Pisa
Leaning Tower of Pisa
The Leaning Tower of Pisa 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 direction.
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. The tower leans at an angle of 5.5 degrees. This may not seem a lot, but this means that the tower is 4.5 metres from where it used to stand vertically.
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