The motif on the northern and southern facades is slightly different from that on the eastern and western facades, in that the top of each rhombus is split by the start of the one above.[3] Except for the southern facade, the bottom of each facade has blind arches that blend into the rest of the motif above.[3] At the top of the main shaft is a wide band of mosaic tilework (zellij) with geometric patterns of radiating, almost circular, stars.