The three synoptic Gospels - the Gospel of Mathew, the Gospel of Mark, and the Gospel of Luke - all relate that Jesus chose twelve of his followers to be his companions in his mission of proclaiming the Gospel. In his two books, the Gospel of Luke and the Acts of the Apostles, the evangelist Luke equates "the Twelve" with "the Apostles" in order to ensure the continuity and legitimacy of the testimony. After Jesus' ascension, the apostles started from Jerusalem to testify what the Lord proclaimed. Luke gives an extensive account of Paul's testimony as well, but Paul was not an apostle in the strict sense, and his testimony differed from that of the "Twelve". How does Luke address the question of Paul's identity? This paper will explore the relationship between the Twelve and the Apostles, the different testimonies of the Apostles and Paul, and will attempt to define Paul's identity.