Although in Islamic sources, there is no order regarding the construction of the Mihrab and minaret of mosques, why are these two phenomena included in the architecture of Muslim places of worship? In this article, in a library method, followings are discussed:-How the Mihrab and minaret entered the architecture of the first century Islamic mosques?-The hypothesis that the Mihrab and minaret are derived from the religion of ancient Iran, the people of the Arabian Peninsula and the temples of Jews and Christians. Historical studies show that in the first century of Islam, these two sections(Mihrab and minaret) were added to the architecture of mosques and Grand mosques: Palestine, Kufa, Medina, Damascus, Qairwan and Fustat in the first century had arched Mihrab and Grand mosques: Basra, Fustat, Damascus, Medina, Qasba in Palestine and Qairwan in the first century had minarets. In the past, minarets were made in rectangles, spirals and cylinders shape, and the materials used in them varied in climatic conditions and architectural culture of the regions, and then the minarets became taller and narrower and lost their use as a minaret.