text: Conquering a flat landscape with serene , other-worldly harmony , this assembly of buildings in an emerald green square also known as the Piazza del Duomo celebrates the whole cycle of life , from baptistery , cathedral , and campanile ( a.k.a. the Leaning Tower ) to the monumental cemetery of the Campo Santo .
  
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  Thousands of people visit the Piazza del Duomo in a single month .