The conditions of Islam for the construction of mosques are purity and receiving the Qiblah, and for this reason mosques came accompanying the renovation and include old mosques or contemporary mosques and depend on the thought and culture of the designer in addition to economic, technological and other factors. Clear to study the subject, and to find a knowledge gap represented by the lack of clarity of knowledge related to the methods of formal renewal in the architecture of mosques, so the research problem was "the lack of sufficient knowledge of the methods of formal renewal of the architecture of ancient and contemporary mosques that architects followed in the renovation processes within the architecture of ancient and contemporary mosques, with no specification Detailed vocabulary for studying the subject. The main objective of this study is to reveal these methods of renewal within the architecture of ancient and contemporary mosques and to identify this vocabulary. Quantitative methods of renovation between ancient and contemporary mosques.