So when the Muslims conquered Egypt and the Arabs to enter the Islamic era, Muslims began to use siblings Christians to help them build their mosques, homes and palaces, markets and bathrooms and other buildings.
As well as the presence of obelisks and towers in the temples, churches, and we find represented in the mosque Palmazn. We also find that the design of windows and equipped with stained glass in churches has been applied in the windows of mosques as well as the decoration of temples, religious texts, as in the churches, which are decorated with great Coptic Christian texts and also the decoration of mosques, the texts from the Koran to decorate mosques and private aspects of the mihrab
With the passage of time, Muslims began to draw architecture of their own by adding elements of Muslim individual not known to Egyptian civilization, pharaonic, during the Greco-Roman enter a geometric and plant in the Islamic architecture both in the buildings of stone or elements of wood and we find this is evident in what influenced by Islamic mosques in Egypt as the internal and external walls have become individually decorated with every new era of medieval Islamic era in Egypt, whether governors or Ataiwlaunayn or Fatimid and Mamluk or Ottoman era, we find that every age has its own characteristics, especially in the minarets and domes. As well as the palaces and houses, so that archaeologists through the study of verse architectural elements can be determined the age of any building or a mosque or a door or architectural element of the characteristics of each era