In studies of Islamic architecture dealing with the earliest periods, a natural emphasis has fallen on the mosques of the Holy Cities of Arabia, the Ḥaramayn, whenever the architecture of the Arabian Peninsula has been discussed. In later periods, extensions and restorations in the Ḥaram in Mecca and the Mosque of the Prophet in al-Madīna have likewise been discussed, but until recent times, little has been said of any other Arabian mosques. As far as mosques beyond the Ḥaramayn are concerned, this neglect has been caused largely by their inaccessibility; but as a result of the imbalance, students of Islamic architecture have been left to judge Arabia by the Prophet's Mosque, which was only truly Arabian at its foundation, and the Ḥaram and the Ka'ba, which were always unique in Islam in terms both of religion and of architecture. As for later extensions and restorations of either mosque, these tell more of the development of Islamic architectural style and taste beyond the Peninsula than of any Arabian religious architectural tradition.
Forty steps to compile the "School of Islamic Architecture" - (In search of a model for the comprehensive benefit of the teachings "Islamic Wisdom" in "Architecture")
