About Saint Stephen
Stephen is traditionally venerated as the protomartyr or first martyr of Christianity. According to the Acts of the Apostles, he was a deacon in the early church at Jerusalem who angered members of various synagogues by his teachings. Accused of blasphemy at his trial, he made a speech denouncing the Jewish authorities who were sitting in judgment on him and was then stoned to death. Saul of Tarsus, a Pharisee and Roman citizen who would later become Paul the Apostle, was also involved as a witness in Stephen's execution.
Biography source:
Wikipedia
