Tower of Pisa-jewel of Italian Romanesque architecture
Leaning Tower of Pisa, the bell tower, or campanile, of the Romanesque cathedral of Pisa, was built to stay upright, but began to tilt as soon as construction began in August 1173.
The height of the tower is 55.7 to 55.8 meters from the base, its weight is estimated at 14,700 tons and the inclination of about 4 ° extending 3.9 m from the vertical. The tower has 8 levels, a database with 15 columns, arches, 6 levels with an external colonnade topped by a belfry. The inner staircase has 294 spiral steps.
It had risen three stories when the works were suspended because of a collapse. Its construction was restarted in 1275, and since then held the first attempts to counteract the tilt of its structure. By 1301 they had erected six main floors and in the late fourteenth century was finally concluded. The tower rises 55 m on a circular of 16 m in diameter and has a maximum slope of about 4 m from the vertical. Its structural peculiarity often overshadow its intrinsic interest as one of the jewels of Italian Romanesque architecture.