Leaning Tower of Pisa

It was built in the Middle Ages It is eight storeys high It is a bell tower or campanileMade of white marble Low side is 55.86 m and the high side is 56.67 m 294 steps on the north side of the tower and 296 steps on the south side of the tower Construction began in 1173 In 1178 at 3 storeys construction interrupted by a war At this time it was already leaning

Leaning Tower of Pisa

Built next two levels on curve, didn’t work, leaned even more 1372 the tower was completed (approximately 200 years later) Tower leans due to sandy soil, foundation is not deep Many commissions to deal with the lean such as injecting concrete under the tower to freeze the soil, bracing the tower with cables and removing soil from under part of the foundation It is interesting that no one wants to completely straighten the tower due to cultural history and tourism The entire Cathedral Square where the tower is located was declared a UNESCO World Heritage Site in 1987

Leaning

Tower of Pisa

- What is (Are) the reason(s) that

the Tower of Pisa began to lean?

- How far is the lean of the tower

today?

- List and describe some of the

attempts that were tried over

the years in order to straighten

out the lean of the tower.

- How could the problem with the

tower have been prevented in the

first place?