4 the leaning tower of pisa
the leaning tower of pisa is very famous and that reason is in it's name. It's leaning
the lening tower of pisa has an interesting history behind it. Ovbiously Bonanno Pisano didn't intend for the tower to lean but tall and heavy structures depend quite a bit on the foundation. The foundation of this tower was only 3 meters deep and even that foundation was built on a dense clay mixture of soil that as it turned out, couldn’t support and hold the weight of the huge tower, which led to this leaning phenomenon.
The real identity of Tower of Pisa’s architects is a mystery. The most accredited architects of this first phase of work are Bonanno Pisano and Gherardo din Gherardo. The second phase of construction started in 1275, and the work is attributed to Giovani di Simone. Tommaso Pisano (1350-1372) was the architect who finished the work.
In 1272, Giovanni di Simone resumed construction and went on to add 4 more floors by compensating for the lean of the tower by making one side of the upper floors taller than the other. However, as it turned out, this manipulation added even more to the lean.
During WWII, the tower was lucky enough not to be knocked down by American troops (they were ordered to destroy each and every standing structure that could aid German snipers against the advancing Allied troops). However, the generals decided to spare the tower and it was left undamaged
Italy had toprevent the tower from collapsing. However, they wanted the lean to remain intact, as it was what attracted and intrigued tourists. As a temporary measure, a lead counterweight (800 tons) was installed.