He is prophet Muhammad (peace be upon him) to whom Quran was revealed by God through the angel Gabriel (or Jibril).
Islam was founded in AD 622.
Islam leader; prophet Muhammad (peace be upon him); didn't escape from Makkah (or Mecca) to Yethrib (or Medina or AlMadinah). He was ordered by God to migrate to Medina to start calling for Islam from there. It was not on his own choice. Additionally, a number of Meccans were plotting to assassinate Muhammad in the upcoming days.
75 to 100 years
Hegira started in 622 AD and when Muhammad had to move from Mecca to Medina to preach Islam.
75 to 100 years
AD 622 implies 622 As for example 2012 in generic terms stated as 2012 AD so todays date will be noted as 12/12/622 :-)
The hijrah occurred in 622 AD, it was a (migration) journey in the 622 AD
The last Prophet of Islam and his followers were maltreated, insulted and tortured so brutally im Makka that they had to migrate to Madina.
Muhammad, leader of Islam, is born.
He was born in year 570 Ad and left Makkah (or Mecca) to Medina in year 622 AD. So, he was 52 years old.
Muhammad was the founder and earliest leader of Islam. His date of birth is unknown but he died in Medina, Saudi Arabia in 632 AD.
C is for circa which means around or approximately. So it means around 570 ad to 622 ad AD meaning after the death of Christ.