Five UNESCO M'zab Valley ksour — an 11th-century Ibadhi urban planning model
Ghardaïa is the main city of the M'zab Valley, a UNESCO World Heritage Site comprising five fortified Ibadhi Muslim communities (ksour) built in the 11th century on a model of radical urban egalitarianism that Le Corbusier studied and cited as an influence on modern architecture. Each ksar is built around a minaret-crowned Friday mosque, with houses radiating outward in a strict social hierarchy — the most devout citizens live closest to the mosque. The five ksour (Ghardaïa, Melika, Beni Isguen, Bounoura, El Atteuf) sit above a dry wadi in the northern Sahara, each with its own distinctive ch…
The five ksour of the M'zab Valley were founded between 1012 and 1350 CE by Ibadhi Muslims, a sect that predates the Sunni/Shia split and was expelled from northern Islamic centres in the 7th century. The communities developed a sophisticated proto-democratic governance system (djemaa), a communal bank, and an architectural philosophy that optimised for desert climate: thick walls, small windows, and shaded streets narrow enough to shade both sides simultaneously. Le Corbusier visited in 1931 and later acknowledged the M'zab in his writings on urbanism. The valley was UNESCO-listed in 1982.