Like nearly all the religious building from that time, the Friday mosque in Marrakesh inaugurated by the Alomoravid governor Ali Ibn Yusuf has disappeared, but what has survived is a rectangular kiosk, whose function is still shrouded in mystery. it might have been destined to shade the ablution fountain from the sun. a type of structure whose history is far from clear; a commemorative building like the Ka'ba at Mecca,whose rectangular shape it recalls; or else a princely pavilion annexed to the mosque, a parallel to the north dome of the Friday mosque at Isfahan, whose use it also anyhow unknown. Although divorced from its purpose, this small building, practically unheralded in terms of shape and dimensions, represents a high point in Almoravid art. Currently the outside presents a character of elegant sobriety, from the shifting surface peppered with refined polylobate windows with merlons of a typical Syrian flavour to the extrados of the cupola decorate with intersecting arch curves and a zigzag pattern.