Saint Peter The Apostle, who was one of the Twelve Apostles of Jesus Christ, and leader of the early Christian Church; Paul the Apostle (c. 5 – c. 67) was originally known as Saul of Tarsus. He was an apostle (though not one of the Twelve Apostles) who taught the gospel of Christ to the first-century world. He is generally considered one of the most important figures of the Apostolic Age. In the mid-30s to the mid-50s, he founded several churches in Asia Minor and Europe. Paul took advantage of his status as both a Jew and a Roman citizen to minister to both Jewish and Roman audiences.