The Tower of Pisa was built to show the rest of the world the wealth of the city of Pisa. The people of Pisa were very good sailors and they conquered many lands, including Jerusalem, Carthago, Ibiza, Mallorca, Africa, Belgium, Britania, Norway, Spain, Morocco, and other places. But they had only one real enemy, the people from Florence. And to show how well they were doing they started to build a really useless belltower to go with the rest of the buildings near it - the Cathedral, Baptistery, and Cemetery.