Saint Luke is the author of both his gospel and the Acts of the Apostles, which should be read as one unit. A Greek physician from Antioch, he was converted by the preaching of Paul. The Acts are dedicated to an unknown governor of the province of Antioch. He is also said to have been the companion of Cleophas on the road to Emmaus. Another tradition claims that he was among the Seventy Disciples who followed Christ during his preaching.