The astrologers stood, their leader leading them, before their master, recounting what had happened on the night the horoscope was chosen and the city's foundations were built. Al-Mu'izz sat up straight on his royal throne, contemplating. His silence clouded everyone's mind until he stood up and said: "When Jawhar set out to conquer Egypt, I said: 'By God, if this Jawhar were to go out alone, he would conquer Egypt. He would enter Egypt in his robes without war, and he would settle in the ruins of Ibn Tulun, and he would build a city that would conquer the world.'" Remember? Everyone nodded and said in unison: "We bear witness." He gestured with his hands and said: "Let its name from now on be called 'Cairo.'"