The study examines the architecture of Al-Aqmar Mosque because of its great importance in the Fatimid architectural inheritedand the conclusion of the most important architectural values influencing its construction and rooting those values through monitoring and analysis of some architectural elements and items through analytical studies provided by this mosque to show the extent of its impact on its design and how the mosque became a source of heritage inspiration of the mosques of the following eras, with different parts of the design in the content and formulation according to the impact of the same era, and models of each type of following eras were selected for the Aqmar Mosque to confirm this, and how the security and wealth of the state affected the luxury of Fatimid architecture, The study also indicates how the material, texture, color, shade and light affect the architectural product and architectural treatments in the architectural formation.