Although only a third as high as the Washington Monument, it was a miracle of medieval engineering, probably the tallest bell towers in Europe. The Leaning Tower of Pisa is the third oldest structure in Pisa’s Cathedral Square, the tower’s tilt began during construction, caused by an inadequate foundation on ground too soft on one side to properly support the structure’s weight. The tilt increased in the decades before the structure was completed, and gradually increased until the structure was stabilized by efforts in the late 20th and early 21st centuries
The height of the tower is 55.86 metres (183.27 feet) from the ground on the low side and 56.67 metres (185.93 feet) on the high side, The tower has eight stories, including the chamber for the bells.
The tower has 296 or 294 steps; the seventh floor has two fewer steps on the north-facing staircase.
Prior to restoration work performed between 1990 and 2001, the tower leaned at an angle of 5.5 degrees, but the tower now leans at about 3.99 degrees. This means that the top of the tower is displaced horizontally The tower is also slightly curved from the attempts by various architects to keep it from leaning more or falling over. In the 1920s the foundations of the tower were injected with cement grouting that has stabilized the tower to some extent. Until recent years tourists were not allowed to climb the staircase inside the tower, due to consolidation work, but now the leaning Tower of Pisa is open again and it is one of the most popular tourist attractions in Italy!
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