“ The Wadi Tiaret flows through the town in a series of cascades. The upper town, the residential quarter, is on the right bank of this stream. The citadel occupies a separate hill on the other side of the wadi. The chief business centre is the lower town where are also the principal public buildings. On another hill opposite the citadel is the native town. ”

“ The Ibadites, after being expelled from the Tell, took refuge in Wargla. They were driven thence in the 11th century and migrated to Mzab, where their descendants still profess the Ibadite doctrines (see Mzabites) . ”