6. Muhammad
Muhammad was orphaned at an early age and raised by his uncle, Abu Talib, before marrying a wealthy woman named Khadija. He was known as a devout man and would frequently go on spiritual retreats up in the surrounding mountains. On one of these retreats, he is believed to have received the first of a series of revelations from the angel Gabriel; together, the revelations would form the Qur’an, the scripture of the Muslim religion.