The new state mosque was commissioned by King Abdullah II to commemorate his late father King Hussein of Jordan. The landmark is identifiable by its simple form and fort-like architectural characteristics. The building is perceived as a coherent structure with low minarets, bold arches and crenellations. Stone and timber are the main materials used. A major design principle has seen integration of environmental design and building form. The deep building plan is bordered by two narrow courtyards providing a source of cool air which is drawn into the building through negative pressure created by the form of vaulted ceilings.