The roof may be constructed with bridging lintels of stone, wood or other rigid material such as cast iron, steel or reinforced concrete. There may be a ceiling. The columns may be all the same height or, as in the case of the Great Hypostyle Hall at Karnak, the columns flanking the central space may be of greater height rather than those of the side aisles, allowing openings in the wall above the smaller columns, through which light is admitted over the aisle roof, through clerestory windows.
With a combination of columns and arches, the hypostyle hall became one of the two main types of mosque construction. In many mosques, especially the early congregational mosques, the prayer hall has the hypostyle form. One of the finest examples of the hypostyle-plan mosques is the Great Mosque of Kairouan (also called the Mosque of Uqba) in the city of Kairouan, Tunisia.
(pp 18-19) Early iterations of the Kaaba also had wooden columns. ... After this building succumbed to fire in the taking of the Haram, Ibn Zubayr ... placed three teak-wood columns in a single row. (p 20) The mosque at Kufa became so paradigmatic that later hypostyle mosques are generally known as Kufa- or Kufic-type mosques.