Ces cités-Etats ont été construites pour certaines dès le XIIe siècle le long des routes commerciales de l'océan Indien.

Some of the ancient cities of palaces, mosques, public squares, and narrow streets date back to the 12th century and are still inhabited.

UNESCO on Saturday added six centuries-old medinas in the Comoros -- once historic sultanates along Indian Ocean trading routes -- to its World Heritage List, raising hopes for…