Tafilalt is a region and the most important oasis of the Moroccan Sahara. It is also considered one of the largest oases in the world, the oasis is entirely located along the Ziz River. The oasis is ten days' journey south of Fez, across the Atlas Mountains. It is celebrated for its large and luscious dates, to the successful cultivation of which, soon after the arrival of an ancestor (Al Hassan Addakhil) of the reigning dynasty of Morocco (the Alaouite Dynasty) around 1250, this dynasty owes its rise to power.