During the war of liberation, Arabs had to have bases from which they could depart from and Pashtun. The cities of Basra, Kufa, Fustat, Kairouan and Wasit were the most important of those bases that witnessed in the first century the course, and these cities are of special importance as they represent the development of Arab architecture during that century in which the distinct foundations of Islamic architecture and arts that All the countries that entered the Islamic state prevailed, with some modifications imposed by the climatic conditions and the geographical environment, in addition to the influences of local arts. Therefore, it is worthwhile to study these cities in terms of their location, their general planning, the site of the grandfather and the principal place of the city, the buildings and the location of the markets.