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pisa tower
Construction started in 1173 and when the builders reached the
third level in 1185, they noticed that
the tower has started to subside and
was leaning slightly- around 4 cm //l
1.5 inches. masons inserted wedge
shaped stones to correct the-
problem , but this only made the
tower start to tilt the other way, At
a loss as to what should be done
worked halted for almost a century
work resumed in 1257 and after
much calculation and discussion
futher three uneven storeys were
added, tilted in an attempt to
counterbalance the lean, giving the
tower its slight 'banana' shape
finally in 1350 a lopsided gothic
belfry was added at the top of the
tower , making the leaning Tower of
pisa 51 metres /170 feet tall .A
couple of centuries later galileo used
the extreme overhang of the tower
to demonstrate the constancy of gravity, by dropping different
.weighted balls of the same size
third level in 1185, they noticed that
the tower has started to subside and
was leaning slightly- around 4 cm //l
1.5 inches. masons inserted wedge
shaped stones to correct the-
problem , but this only made the
tower start to tilt the other way, At
a loss as to what should be done
worked halted for almost a century
work resumed in 1257 and after
much calculation and discussion
futher three uneven storeys were
added, tilted in an attempt to
counterbalance the lean, giving the
tower its slight 'banana' shape
finally in 1350 a lopsided gothic
belfry was added at the top of the
tower , making the leaning Tower of
pisa 51 metres /170 feet tall .A
couple of centuries later galileo used
the extreme overhang of the tower
to demonstrate the constancy of gravity, by dropping different
.weighted balls of the same size
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