Virtually all modern scholars of antiquity agree that Jesus existed historically,[f] although the quest for the historical Jesus has produced little agreement on the historical reliability of the Gospels and on how closely the biblical Jesus reflects the historical Jesus.[19] Most scholars agree that Jesus was a Jewish rabbi from Galilee who preached his message orally,[20] was baptized by John the Baptist, and was crucified in Jerusalem on the orders of the Roman prefect, Pontius Pilate.[21] 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.[22] Scholars have correlated the New Testament accounts with non-Christian historical records to arrive at an estimated chronology of Jesus' life. The widely accepted calendar era (abbreviated as "AD", alternatively referred to as "CE"), counts from a medieval estimate of the birth year of Jesus.