It's one of the most beautiful goofs in all of history.
The bell tower, aptly located in the Campo dei Miracoli (Field of
Miracles) in Pisa, Italy, is a stunning monument to the human will.
This is a structure that literally struggled to be built.
On August 9, 1173, architect Bonanno Pisano began construction
of the bell tower in the center of the square. A little over two years
later, during the building of the third tier, its trademark lean was
initially discovered. It wasn't the fault of the design -- the cylindrical
measurements attest to its architect's integrity -- but the soil on
which the tower was situated was too soft, and the tower's foundation
tipped. This naturally posed a dilemma, and for ninety years the tower
There must be something about the way it inclined that
intrigued the Pisans. They attempted to straighten it, but after a
few years of trying, they realized it was impossible. However, that
didn't stop completion of the tower. Giovanni di Simone took over
the project, and four loggette (stories) were added, stopping whenever
war broke out in the volatile region. The belfry, residing on the
seventh and final level, is attributed to one of Pisano's relatives,
who completed the tower in 1350, one hundred and seventy-five years
after its flaw was first discovered.