The captain of the guard; the praefectus praetorio, being commander-in-chief over the soldiers, and unto whom the prisoners of state were usually committed.
Paul was suffered to dwell by himself; God by this means giving Paul an opportunity to go abroad at his pleasure; though chained, as Act_28:20, yet he might preach the gospel, and that was not bound, 2Ti_2:9. And now God is with Paul, as he was with Joseph, in prison, Gen_39:21, and procures him favour.