The uniqueness of the urban development of Aleppo, the commercial metropolis in northern Syria, is to find in her historical complexity and her strong integration by the Islamic Principle. Such a feature of the city can be seen especially in the centre of the city. There is a big market, called Suq, which includes not only the daily market, but also the trade centre of the foreign merchants, named Khan, where foreign merchants and diplomats even had stayed. Compared with the occidental urban development, the result of which has been the functional division of labour or activity, the urban development of Aleppo has brought the normative integration of the secular and the sacred activity.