Mosque is most religious architecture of Islam. In early creation, Mosque did not have any specific size and dimension, and simple hypostyle structure of Prophet's house at Medina was followed by Khalifa for building of mosque. It is an essential architecture created for place of prostration, rituals, religious and political purposes. The architecture of mosque had been progressed during Khalifa Walid. The structure of mosque is very simple but provides more functional value. This article deals with architecture of mosque with origin and development. It discusses early creation and its hypostyle structure with feature. It describes the key elements of mosque architecture that developed and elaborated in different parts of the world. All the elements of mosque are mentioned here with their origin, function and development.