A: Makkah, Jabal An Nur, Makkah Province, Saudi Arabia
"Muslims say that in 611, at about the age of forty, while meditating in a cave near Mecca, he [Muhammad (Mohammed, Mohamet)] experienced a vision. Later he described the experience to those close to him as a visit from the Angel Gabriel, who commanded him to memorize and recite the verses later collected as the Qur'an [Koran]."