Public Squares: Hinges of Commercial Circulations, between Oasis and Arabs/Moslim Cities

Throughout history, the routes of Sahara were able to connect and arrange a direct transition, and a correlative relationship between sub-Saharan Africa and the Mediterranean. The network borrowed by channels of migration, convert the Sahara, from a marginal periphery at an intersection weaving relational mesh at an intercontinental level, based on the Exchange and trade. trade creates the city, settlement, the garrison, and the State (Olivier fold, 2001). Economic and demographic dynamism can be witness of the insertion of the cities, a trading system wide span, bypassing national territorial boundaries. He was relying on a relay device and intersections: that are market places, which conveyed the urban fabric of the Sahara. These public places which were stages of the migratory movement, were therefore places of home of transhumance from Africa in the direction of Europe, instead of Exchange, relay, social links and urbanity: in other words, the heart beating of oasis, and cities surroundings of the Mediterranean basin, and crucial points of the economic and social development. Today these areas have experienced disruptions. They wither the secular market logic, which would be at the origin of the source of life for these companies. Subsequently, they destroyed relations between cities. Hence the objective aimed by this study, aspires to understand space transit registration and its impacts on the one hand, and to identify on the other hand the ins and outs originally these mutations, and the decline of the past of thriving trade between civilizations.