Augustus in the Bible

Luke 2:1 And it came to pass in those days, that there went out a decree from Caesar Augustus, that all the world should be taxed.
Acts 25:21 But when Paul had appealed to be reserved unto the hearing of Augustus, I commanded him to be kept till I might send him to Caesar.
Acts 25:25 But when I found that he had committed nothing worthy of death, and that he himself hath appealed to Augustus, I have determined to send him.
Acts 27:1 And when it was determined that we should sail into Italy, they delivered Paul and certain other prisoners unto one named Julius, a centurion of Augustus' band.