Itchan Kala, the inner town of Khiva, is a preserved example of a Muslem city in Asia at the beginning of the 19th century. The town is completely surrounded by brick city walls, which have four gates at the cardinal points. The oasis of Khiva was the last halting place for caravans before the desert in Iran. Since the 4th century it was the center of Khorezm civilization, an Iranian kingdom famous in Antiquity for its hydraulic techniques.Nowadays, Itchan Kala presents unique examples of mosl