Il Milione
Because of its remote desert location and the difficulty of access, Yazd remained largely immune to large battles and the destruction and ravages of war. For instance, it was a haven for those fleeing from destruction in other parts of Persian Empire during the Mongol invasion. In 1272 it was visited by Marco Polo, who remarked on the city's fine silk-weaving industry. In the book "The Travels of Marco Polo", he described Yazd in the following way: