The challenging framework of the old political power in the Constitutional Revolution led to many changes in the social and economic structures of Iran, which became part of urban renewal and renaissance. But due to political crises after the Constitutional Revolution and the outbreak of the World War I, practically new ideas in the physical change of cities were interrupted. With the reign of Reza Shah and the new order in which the Majles, the Army and the emerging bureaucracy formed its foundations, modernization was found in urban plans and designs. The ideas within the head followed the changing faces of the cities, whose type of structure was a symbol of backwardness and tradition, and which had to be quickly adapted to other parts of society, a new, and regular appearance. The existence of urban management infrastructure, such as Baladiah, was binding on such plans, so rules were quickly drafted to establish such institutions. The city of Yazd entered the changes relative to its population and history, although later than many other cities, but with the formation of Baladieh of Yazd in the year 1310, urban renewal projects, which symbolized cross-streets, were applied to various parts of that city, which an example was the construction of two main streets of Pahlavi and Shah and the passage of these streets right in the middle of the historical urban fabric.