The Leaning Tower of Pisa is actually the bell tower or the campanile, located next to the Cathedral in the Piazza dei Miracoli or in the Square of Miracles in the city of Pisa, Italy. It is a medieval style of architecture constructed in 1173 and completed in 1399. Over the course of 800 years, because of the poorly laid foundation and loose subsoil, the 55-meter tower started to lean at a rate of one to two millimetres per year. Today, the tower is now leaning at a 5 degree angle from its original position.
The Leaning Tower of Pisa is obviously an engineering failure but it is precisely because of that that it became of the world’s most iconic structure with millions of tourists going to Pisa every year just to see it. This is one classic example of how failure is part of success. If it was not a failure, it would just be one ordinary tower in Pisa.