Leaning Tower of Pisa
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. The tower is situated behind the Pisa Cathedral and is the third oldest structure in the city's Cathedral Square, after the cathedral and the Pisa Baptistry. A 2001 study seems to indicate Diotisalvi was the original architect, due to the time of construction and affinity with other Diotisalvi works, notably the bell tower of San Nicola and the Baptistery, both in Pisa.
The construction of the Tower of Pisa was carried out in three stages over a period of 200 years. The construction of the first floor of a rocky white marble campanile began on 9 August 1173. The first floor is surrounded by a pillar with classic letters, which leads tilted to the arches of the blinds. Actually, the Leaning Tower should have stood as high as 55 feet, but since the Leaning Tower of Pisa was built on an unstable soil, the Tower was eventually tilted from a straight line of 5 meters.
After a phase (1990-2001) of structural strengthening, [11] the tower is currently undergoing gradual surface restoration, in order to repair visible damage, mostly corrosion and blackening. These are particularly pronounced due to the tower's age and its exposure to wind and rain.
Reference :
https://en.wikipedia.org/wiki/Leaning_Tower_of_Pisa
