gone through three phases before getting to where she is today. Started by the pre-colonial phase which testifies, that the city was pending this period under Roman rule over country of the Berbers, and having taken the role of the capital of southern Numidia, and the A very prosperous city, built by the Muslims in the Middle Ages. During the Turkish period the city was hit by epidemics, binding occupiers of the fort to leave the city to settle, in a group scattered the interior of the palm grove, south of the city, around two elements of the form local production, the built environment that are the mosque and seguias, besides the use local building materials. Secondly, the city was marked by the colonial phase characterized by the building of fort Saint Germain on the northern part, and the construction of a city (the colonial checkerboard) by an urban model, different from the previous one, and having undergone several extension, particularly the 1st and 2nd and the Dervau Plan, followed during the 50s, by popular extensions to the South at the expense of the palm grove and without dimensional and formal logic. In the end the post colonial phase characterized by the proliferation of self-built no plan to urban and architectural quality at least and without model, where typological reference, which has only to be curbed, after the instruction of the laws intervention and control of the state, over the urban space, by launching large Housing development operations in the framework of ZUNH, in the form of housing communal collective or subdivision which, despite this, has not been able to resolve the demand for housing, bringing the state to promulgation, other laws havingobjective, improving urban quality, openness and diversification stakeholders. Today, the city of Biskra is made up of 28 neighborhoods including 3 main ones which are, Korra, City 60 Logts ENICAB and Equipment Zones. Climate Biskra has a subtropical hot desert climate (Köppen climate classification BWh) typical of the region in which it is found. The city has long and extremely hot summers and short, pleasantly warm winters. In summer, the peaks of heat are among the highest in the country with temperatures that can exceed and are similar to cities like Luxor or Phoenix. The average peak July temperature, which is the hottest month, is about . On average, the city experiences more than 92 days a year