who is the aforementioned person?
He  was an Arab religious, social, and political leader and the founder of Islam.
Muhammad
 was an Arab religious, social, and political leader and the founder of Islam. 
when did two million pilgrims make the hajj UNANSWERABLE is it a religious pilgrimage? Yes, it  is an annual Islamic pilgrimage,  a mandatory religious duty for Muslims that must be carried out at least once in their lifetime where does it take place? Mecca, Saudi Arabia, the holiest city for Muslims. the city mentioned what are the major events in its early history? The Roman Empire took control of part of the Hejaz in 106 CE, ruling cities such as Hegra what are other places in this city that are considered significant in islam? The Hira cave, Great Mosque of Makkah is the islamic pilgrimage associated with any person? Yes, The present pattern of Hajj was established by Muhammad. The Hajj is a demonstration of the solidarity of the Muslim people, and their submission to God (Allah).
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Muhammad [SEP] Introduction
Muhammad (, ; c. 570 CE – 8 June 632 CE) was an Arab religious, social, and political leader and the founder of Islam. According to Islamic doctrine, he was a prophet, sent to preach and confirm the monotheistic teachings of Adam, Abraham, Moses, Jesus, and other prophets. He is believed to be the final prophet of God in all the main branches of Islam, though some modern denominations diverge from this belief. Muhammad united Arabia into a single Muslim polity, with the Quran as well as his teachings and practices forming the basis of Islamic religious belief. Born approximately 570CE (Year of the Elephant) in the Arabian city of Mecca, Muhammad was orphaned at the age of six.