Egyptians today often refer to Cairo as Maṣr ([mɑsˤɾ], مصر), the Egyptian Arabic pronunciation of the name for Egypt itself, emphasizing the city's continued role in Egyptian influence. Its official name is القاهرةal-Qāhirah, means literally: "the Defeater", in reference to the fact that the planet Mars ("Al Najm Al Qahir") was rising at the time when the city was founded as well as, "the Vanquisher"; "the Conqueror"; Egyptian Arabic pronunciation:[elqɑ(ː)ˈheɾɑ], "the Defeater" or, " "the Victorious" (al-Qahira) in reference to the much awaited Caliph al-Mu'izz li Din Allah who arrived from the old Fatimid Ifriqiyan capital of Mahdia in 973 to the city. The Egyptian name for Cairo is said to be: Khere-Ohe, meaning: "The Place of Combat", supposedly, in reference to a battle which took place between the Gods Seth and Horus. Sometimes the city is informally also referred to as كايروKayro[ˈkæjɾo]. It is also called Umm ad-Dunya, meaning "the mother of the world".