Undoubtedly, the study of designs of any Islamic Arabic city entails the study of its cultural development. The architectural expansion of a certain city, for instance, usually reflects the development to which that city reached at the economic, social, or educational levels, as well as the government policies towards it. Moreover, knowing the names of places and their exact locations help under standing the actual historical events at certains points in time. Due to the fact that Mosul was one of the most important and ancient cities and it was one of the strongholds of Islam, it had received the Islamic Arabic culture since the early days of its liberation. It had also witnessed aremarkable development because of its geographical location and its influential role in other Islamic Arabic cities. Mosul became the attraction centre of people from different countries. It had been greatly attended by the Islamic Arabic Rule. Consequently, such attention had positive effects on its architectural development and on its designs, except for some periods in which instability prevailed the city. The designs of Mosul had been tackled by books of History, geography, travelling and biographies throughout different historical stages. In order to highlight aspects of that cultural development, we find it significant to study Mosul designs as depicted in. Mosul History by Abi-Zakaria Al-Azdi Al Mosilli (33A H/ 945 A.D). Al-Azdis work is one of the first resources concerned with the history of Mosul. Therefore, He is regarded as one of the eontemporary historians who witnessed and depicted the cultural and political history of Mosul, as well as its designs truly. Unfortunately, we have received only volume 2 of his three-volume book, as pointed out by Dr. Ali Habiba in the introduction to his book published in cairo 1967. Habibas book tackled different designs of the city mentioned by Al-Azdi such as: the mosque, ruling house, Houses, palaces, lanes and roads, markets, inns, churches, Mosul walls, the bridge, al-ur river. The book also tackled the political, social, economic and adacational factors that effected designs of Mosul. To be neted, Some information about these designs was given in brief, perhaps some of these were totally neglected by Al-Azdi due to the fact that they were well-known to the people at that time; therefore, the writer found it irrelevant to give details of those designs.