5It took thousands of workers, a new canal system and over six centuries to complete

The construction of the Duomo officially started in 1386 by Bishop Antonio da Saluzzo and was supported by the ruler of Milan Gian Galeazzo Visconti who had grand visions of the cathedral.

Though originally started in terracotta stone, once the grandeur of the project was realized Condoglian marble from Lake Maggiore was chosen. The entire building is made up of this pink-hued white marble.

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