The Almohads destroyed everything else their Almoravid predecessors built in Marrakesh, but overlooked this small, graceful 12th-century koubba (shrine) across from Ali ben Youssef Mosque, which was probably used for ablutions. This architectural relic reveals what Hispano-Moresque architecture owes to the Almoravids: keyhole arches, ribbed vaulting, interlaced arabesques and domed cupolas on crenellated bases.