Jesus , also referred to as Jesus of Nazareth, is the central figure of Christianity, whom the teachings of most Christian denominations hold to be the Son of God. Christianity regards Jesus as the awaited Messiah of the Old Testament and refers to him as Jesus Christ, a name that is also used in non-Christian contexts. He is also a major figure in Islam.Virtually all modern scholars of antiquity agree that Jesus existed historically, although the quest for the historical Jesus has produced little agreement on the historical reliability of the Gospels and how closely the biblical Jesus reflects the historical Jesus. Most scholars agree that Jesus was a Jewish rabbi from Galilee who preached his message orally, was baptized by John the Baptist, and was crucified in Jerusalem on the orders of the Roman prefect, Pontius Pilate. Scholars have constructed various portraits of the historical Jesus, which often depict him as having one or more of the following roles: the leader of an apocalyptic movement, Messiah, a charismatic healer, a sage and philosopher, or an egalitarian social reformer. Scholars have correlated the New Testament accounts with non-Christian historical records to arrive at an estimated chronology of Jesus' life. The most widely used calendar era in the world , in which the current year is, counts from a medieval estimate of the birth year of Jesus.