The Tower of Pisa, whose official name is Torre Pendente Di Pisa, has become one of the most tourist places of the world, but few are those who know the real story behind this popular building.
Its construction began on August 9, 1173 and began to lean as soon as its construction began. Its height is 55.7 to 55.8 meters from the base, weight is estimated at 14 thousand 700 tons and about 4 degrees inclination has led her to be around 4 meters uneven vertical.
It is considered, along with the Cathedral of the part, a jewel of Romanesque art while the government of Italian country has requested assistance several times to prevent its collapse, eliminating 70 tons of soil from their foundations, reinforcing to seal the interior walls, placing 630 tons of lead on the north side to counteract the thrust of the tower, trying to shore up side down with subsurface injection of liquid nitrogen and removing subsurface rocks, iron bars to place in place; however, none of them got the expected result.
Finally in 1999, the tower was stabilized by controlled from the ground on the north side and pushed back the tower to tilt it had in 1838 a complex monitoring system that allows the millimeter measurement was also installed removal structural behavior of the tower.
1. You know what the real function of this tower? Part of the Cathedral of Pisa is a bell tower. Inside there are 7 bells and is a building of 8 floors.
2. Any record of the era is written the name of the architect behind the construction of the tower, which has generated considerable debate. Some say it was the architect Bonanno Pisano, but also recognized as potential authors Diotisalvi as Bedouin.
3. Its construction can be summarized into 3 stages: the first three floors of the tower were built between 1173 and 1178 In 1272 construction resumed and 1278 the seventh level is reached. Finally, in 1370 the tower was officially complete. That is, it took 197 years.
4. This peculiar leaning tower was not built, but because of the insufficient depth of the foundations, only 3 meters, the ground began to give up almost to the time when construction began, and since then, has been leaning tower.
5. The top two floors of the tower are not parallel, but wedge designed precisely to try to compensate for the tilt.
6. Many think that this is the most tilted tower in the world, however some years ago was overwhelmed by the belfry of Suurhusen, in German, with 6 degrees of tilt, while Pisa has only 4.5 degrees.
7. Thanks to its height, became from the thirteenth century lighthouse, an observatory and a symbol of the city. Its strategic position, drawn by the Romans allowed to observe dozens of miles around, so it was monitoring point in medieval and Renaissance times.
8. It is said that during World War II, the United States Navy decided to demolish all the towers of Pisa, they represented a danger for positions that could have snipers on the other side. The Tower of Pisa was saved by a removal order at the last minute.
9. This tower is a clear example of Pisan Romanesque architectural style, with built in white marble and exterior ornamentation with columns galleries which thread spiral.